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id="toc-Composición_y_estructura" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Composición_y_estructura"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Composición y estructura</span> </div> </a> <ul id="toc-Composición_y_estructura-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Orixe" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Orixe"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Orixe</span> </div> </a> <ul id="toc-Orixe-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Cometes" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Cometes"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Cometes</span> </div> </a> <ul id="toc-Cometes-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Fuercies_de_marea" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Fuercies_de_marea"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Fuercies de marea</span> </div> </a> <button aria-controls="toc-Fuercies_de_marea-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Alternar subsección Fuercies de marea</span> </button> <ul id="toc-Fuercies_de_marea-sublist" class="vector-toc-list"> <li id="toc-Ciclos_d'estinción" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Ciclos_d'estinción"> <div class="vector-toc-text"> <span class="vector-toc-numb">5.1</span> <span>Ciclos d'estinción</span> </div> </a> <ul id="toc-Ciclos_d'estinción-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Perturbaciones_estelares" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Perturbaciones_estelares"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Perturbaciones estelares</span> </div> </a> <button aria-controls="toc-Perturbaciones_estelares-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Alternar subsección Perturbaciones estelares</span> </button> <ul id="toc-Perturbaciones_estelares-sublist" class="vector-toc-list"> <li id="toc-Hipótesis_de_Némesis" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Hipótesis_de_Némesis"> <div class="vector-toc-text"> <span class="vector-toc-numb">6.1</span> <span>Hipótesis de Némesis</span> </div> </a> <ul id="toc-Hipótesis_de_Némesis-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Oxetos_de_la_nube_d'Oort" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Oxetos_de_la_nube_d'Oort"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>Oxetos de la nube d'Oort</span> </div> </a> <ul id="toc-Oxetos_de_la_nube_d'Oort-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Ver_tamién" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Ver_tamién"> <div class="vector-toc-text"> <span class="vector-toc-numb">8</span> <span>Ver tamién</span> </div> </a> <ul id="toc-Ver_tamién-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Notes" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Notes"> <div class="vector-toc-text"> <span class="vector-toc-numb">9</span> <span>Notes</span> </div> </a> <ul id="toc-Notes-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Referencies" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Referencies"> <div class="vector-toc-text"> <span class="vector-toc-numb">10</span> <span>Referencies</span> </div> </a> <ul id="toc-Referencies-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Enllaces_esternos" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Enllaces_esternos"> <div class="vector-toc-text"> <span class="vector-toc-numb">11</span> <span>Enllaces esternos</span> </div> </a> <ul id="toc-Enllaces_esternos-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Conteníu" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Cambiar a la tabla de contenidos" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Cambiar a la tabla de contenidos</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Nube d'Oort</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Ir a un artículo en otro idioma. Disponible en 95 idiomas" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-95" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">95 llingües</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-af mw-list-item"><a href="https://af.wikipedia.org/wiki/Oortwolk" title="Oortwolk – afrikaans" lang="af" hreflang="af" data-title="Oortwolk" data-language-autonym="Afrikaans" data-language-local-name="afrikaans" class="interlanguage-link-target"><span>Afrikaans</span></a></li><li class="interlanguage-link interwiki-an mw-list-item"><a href="https://an.wikipedia.org/wiki/Boira_d%27Oort" title="Boira d'Oort – aragonés" lang="an" hreflang="an" data-title="Boira d'Oort" data-language-autonym="Aragonés" data-language-local-name="aragonés" class="interlanguage-link-target"><span>Aragonés</span></a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%B3%D8%AD%D8%A7%D8%A8%D8%A9_%D8%A3%D9%88%D8%B1%D8%B7" title="سحابة أورط – árabe" lang="ar" hreflang="ar" data-title="سحابة أورط" data-language-autonym="العربية" data-language-local-name="árabe" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ary mw-list-item"><a href="https://ary.wikipedia.org/wiki/%D8%BA%D9%8A%D8%A7%D9%85%D8%A9_%D8%AF_%D8%A4%D8%B1%D8%AA" title="غيامة د ؤرت – árabe de Marruecos" lang="ary" hreflang="ary" data-title="غيامة د ؤرت" data-language-autonym="الدارجة" data-language-local-name="árabe de Marruecos" class="interlanguage-link-target"><span>الدارجة</span></a></li><li class="interlanguage-link interwiki-as mw-list-item"><a href="https://as.wikipedia.org/wiki/%E0%A6%89%E0%A7%B0%E0%A7%8D%E0%A6%9F_%E0%A6%AE%E0%A7%87%E0%A6%98" title="উৰ্ট মেঘ – asamés" lang="as" hreflang="as" data-title="উৰ্ট মেঘ" data-language-autonym="অসমীয়া" data-language-local-name="asamés" class="interlanguage-link-target"><span>অসমীয়া</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/Oort_buludu" title="Oort buludu – azerbaixanu" lang="az" hreflang="az" data-title="Oort buludu" data-language-autonym="Azərbaycanca" data-language-local-name="azerbaixanu" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-bar mw-list-item"><a href="https://bar.wikipedia.org/wiki/Oortsche_Woikn" title="Oortsche Woikn – bávaru" lang="bar" hreflang="bar" data-title="Oortsche Woikn" data-language-autonym="Boarisch" data-language-local-name="bávaru" class="interlanguage-link-target"><span>Boarisch</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%92%D0%BE%D0%B1%D0%BB%D0%B0%D0%BA%D0%B0_%D0%9E%D0%B0%D1%80%D1%82%D0%B0" title="Воблака Оарта – bielorrusu" lang="be" hreflang="be" data-title="Воблака Оарта" data-language-autonym="Беларуская" data-language-local-name="bielorrusu" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-be-x-old mw-list-item"><a href="https://be-tarask.wikipedia.org/wiki/%D0%92%D0%BE%D0%B1%D0%BB%D0%B0%D0%BA%D0%B0_%D0%9E%D0%BE%D1%80%D1%82%D0%B0" title="Воблака Оорта – Belarusian (Taraškievica orthography)" lang="be-tarask" hreflang="be-tarask" data-title="Воблака Оорта" data-language-autonym="Беларуская (тарашкевіца)" data-language-local-name="Belarusian (Taraškievica orthography)" class="interlanguage-link-target"><span>Беларуская (тарашкевіца)</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%9E%D0%B1%D0%BB%D0%B0%D0%BA_%D0%BD%D0%B0_%D0%9E%D0%BE%D1%80%D1%82" title="Облак на Оорт – búlgaru" lang="bg" hreflang="bg" data-title="Облак на Оорт" data-language-autonym="Български" data-language-local-name="búlgaru" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%89%E0%A6%B0%E0%A7%8D%E0%A6%9F_%E0%A6%AE%E0%A7%87%E0%A6%98" title="উর্ট মেঘ – bengalín" lang="bn" hreflang="bn" data-title="উর্ট মেঘ" data-language-autonym="বাংলা" data-language-local-name="bengalín" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-br mw-list-item"><a href="https://br.wikipedia.org/wiki/Koumoulennad_Oort" title="Koumoulennad Oort – bretón" lang="br" hreflang="br" data-title="Koumoulennad Oort" data-language-autonym="Brezhoneg" data-language-local-name="bretón" class="interlanguage-link-target"><span>Brezhoneg</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Oortov_oblak" title="Oortov oblak – bosniu" lang="bs" hreflang="bs" data-title="Oortov oblak" data-language-autonym="Bosanski" data-language-local-name="bosniu" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-ca badge-Q17437796 badge-featuredarticle mw-list-item" title="artículos destacaos"><a href="https://ca.wikipedia.org/wiki/N%C3%BAvol_d%27Oort" title="Núvol d'Oort – catalán" lang="ca" hreflang="ca" data-title="Núvol d'Oort" data-language-autonym="Català" data-language-local-name="catalán" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Oort%C5%AFv_oblak" title="Oortův oblak – checu" lang="cs" hreflang="cs" data-title="Oortův oblak" data-language-autonym="Čeština" data-language-local-name="checu" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-cy mw-list-item"><a href="https://cy.wikipedia.org/wiki/Cwmwl_Oort" title="Cwmwl Oort – galés" lang="cy" hreflang="cy" data-title="Cwmwl Oort" data-language-autonym="Cymraeg" data-language-local-name="galés" class="interlanguage-link-target"><span>Cymraeg</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Oortskyen" title="Oortskyen – danés" lang="da" hreflang="da" data-title="Oortskyen" data-language-autonym="Dansk" data-language-local-name="danés" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Oortsche_Wolke" title="Oortsche Wolke – alemán" lang="de" hreflang="de" data-title="Oortsche Wolke" data-language-autonym="Deutsch" data-language-local-name="alemán" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%9D%CE%AD%CF%86%CE%BF%CF%82_%CF%84%CE%BF%CF%85_%CE%8C%CE%BF%CF%81%CF%84" title="Νέφος του Όορτ – griegu" lang="el" hreflang="el" data-title="Νέφος του Όορτ" data-language-autonym="Ελληνικά" data-language-local-name="griegu" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-eml mw-list-item"><a href="https://eml.wikipedia.org/wiki/N%C3%B9vul_%27d_Oort" title="Nùvul 'd Oort – Emiliano-Romagnolo" lang="egl" hreflang="egl" data-title="Nùvul 'd Oort" data-language-autonym="Emiliàn e rumagnòl" data-language-local-name="Emiliano-Romagnolo" class="interlanguage-link-target"><span>Emiliàn e rumagnòl</span></a></li><li class="interlanguage-link interwiki-en badge-Q17437796 badge-featuredarticle mw-list-item" title="artículos destacaos"><a href="https://en.wikipedia.org/wiki/Oort_cloud" title="Oort cloud – inglés" lang="en" hreflang="en" data-title="Oort cloud" data-language-autonym="English" data-language-local-name="inglés" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Oorta_nubo" title="Oorta nubo – esperanto" lang="eo" hreflang="eo" data-title="Oorta nubo" data-language-autonym="Esperanto" data-language-local-name="esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-es badge-Q17437796 badge-featuredarticle mw-list-item" title="artículos destacaos"><a href="https://es.wikipedia.org/wiki/Nube_de_Oort" title="Nube de Oort – español" lang="es" hreflang="es" data-title="Nube de Oort" data-language-autonym="Español" data-language-local-name="español" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/%C3%96piku-Oorti_pilv" title="Öpiku-Oorti pilv – estoniu" lang="et" hreflang="et" data-title="Öpiku-Oorti pilv" data-language-autonym="Eesti" data-language-local-name="estoniu" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-eu badge-Q17437796 badge-featuredarticle mw-list-item" title="artículos destacaos"><a href="https://eu.wikipedia.org/wiki/Oorten_hodeia" title="Oorten hodeia – vascu" lang="eu" hreflang="eu" data-title="Oorten hodeia" data-language-autonym="Euskara" data-language-local-name="vascu" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%A7%D8%A8%D8%B1_%D8%A7%D9%88%D8%B1%D8%AA" title="ابر اورت – persa" lang="fa" hreflang="fa" data-title="ابر اورت" data-language-autonym="فارسی" data-language-local-name="persa" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Oortin_pilvi" title="Oortin pilvi – finlandés" lang="fi" hreflang="fi" data-title="Oortin pilvi" data-language-autonym="Suomi" data-language-local-name="finlandés" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Nuage_de_Oort" title="Nuage de Oort – francés" lang="fr" hreflang="fr" data-title="Nuage de Oort" data-language-autonym="Français" data-language-local-name="francés" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/Scamall_Oort" title="Scamall Oort – irlandés" lang="ga" hreflang="ga" data-title="Scamall Oort" data-language-autonym="Gaeilge" data-language-local-name="irlandés" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-gd mw-list-item"><a href="https://gd.wikipedia.org/wiki/Neul_Oort" title="Neul Oort – gaélicu escocés" lang="gd" hreflang="gd" data-title="Neul Oort" data-language-autonym="Gàidhlig" data-language-local-name="gaélicu escocés" class="interlanguage-link-target"><span>Gàidhlig</span></a></li><li class="interlanguage-link interwiki-gl badge-Q17437796 badge-featuredarticle mw-list-item" title="artículos destacaos"><a href="https://gl.wikipedia.org/wiki/Nube_de_Oort" title="Nube de Oort – gallegu" lang="gl" hreflang="gl" data-title="Nube de Oort" data-language-autonym="Galego" data-language-local-name="gallegu" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-gn mw-list-item"><a href="https://gn.wikipedia.org/wiki/Arai_Oort" title="Arai Oort – guaraní" lang="gn" hreflang="gn" data-title="Arai Oort" data-language-autonym="Avañe'ẽ" data-language-local-name="guaraní" class="interlanguage-link-target"><span>Avañe'ẽ</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%A2%D7%A0%D7%A0%D7%AA_%D7%90%D7%95%D7%A8%D7%98" title="עננת אורט – hebréu" lang="he" hreflang="he" data-title="עננת אורט" data-language-autonym="עברית" data-language-local-name="hebréu" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%94%E0%A4%B0%E0%A5%8D%E0%A4%9F_%E0%A4%AC%E0%A4%BE%E0%A4%A6%E0%A4%B2" title="और्ट बादल – hindi" lang="hi" hreflang="hi" data-title="और्ट बादल" data-language-autonym="हिन्दी" data-language-local-name="hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Oortov_oblak" title="Oortov oblak – croata" lang="hr" hreflang="hr" data-title="Oortov oblak" data-language-autonym="Hrvatski" data-language-local-name="croata" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Oort-felh%C5%91" title="Oort-felhő – húngaru" lang="hu" hreflang="hu" data-title="Oort-felhő" data-language-autonym="Magyar" data-language-local-name="húngaru" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D5%95%D5%B8%D6%80%D5%BF%D5%AB_%D5%A1%D5%B4%D5%BA" title="Օորտի ամպ – armeniu" lang="hy" hreflang="hy" data-title="Օորտի ամպ" data-language-autonym="Հայերեն" data-language-local-name="armeniu" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Awan_Oort" title="Awan Oort – indonesiu" lang="id" hreflang="id" data-title="Awan Oort" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonesiu" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-is mw-list-item"><a href="https://is.wikipedia.org/wiki/Oortsk%C3%BD" title="Oortský – islandés" lang="is" hreflang="is" data-title="Oortský" data-language-autonym="Íslenska" data-language-local-name="islandés" class="interlanguage-link-target"><span>Íslenska</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Nube_di_Oort" title="Nube di Oort – italianu" lang="it" hreflang="it" data-title="Nube di Oort" data-language-autonym="Italiano" data-language-local-name="italianu" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E3%82%AA%E3%83%BC%E3%83%AB%E3%83%88%E3%81%AE%E9%9B%B2" title="オールトの雲 – xaponés" lang="ja" hreflang="ja" data-title="オールトの雲" data-language-autonym="日本語" data-language-local-name="xaponés" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-jv mw-list-item"><a href="https://jv.wikipedia.org/wiki/M%C3%A9ga_Oort" title="Méga Oort – xavanés" lang="jv" hreflang="jv" data-title="Méga Oort" data-language-autonym="Jawa" data-language-local-name="xavanés" class="interlanguage-link-target"><span>Jawa</span></a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/%E1%83%9D%E1%83%9D%E1%83%A0%E1%83%A2%E1%83%98%E1%83%A1_%E1%83%A6%E1%83%A0%E1%83%A3%E1%83%91%E1%83%94%E1%83%9A%E1%83%98" title="ოორტის ღრუბელი – xeorxanu" lang="ka" hreflang="ka" data-title="ოორტის ღრუბელი" data-language-autonym="ქართული" data-language-local-name="xeorxanu" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-kn mw-list-item"><a href="https://kn.wikipedia.org/wiki/%E0%B2%8A%E0%B2%B0%E0%B3%8D%E0%B2%9F%E0%B3%8D_%E0%B2%AE%E0%B3%8B%E0%B2%A1" title="ಊರ್ಟ್ ಮೋಡ – canarés" lang="kn" hreflang="kn" data-title="ಊರ್ಟ್ ಮೋಡ" data-language-autonym="ಕನ್ನಡ" data-language-local-name="canarés" class="interlanguage-link-target"><span>ಕನ್ನಡ</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%98%A4%EB%A5%B4%ED%8A%B8_%EA%B5%AC%EB%A6%84" title="오르트 구름 – coreanu" lang="ko" hreflang="ko" data-title="오르트 구름" data-language-autonym="한국어" data-language-local-name="coreanu" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-ksh mw-list-item"><a href="https://ksh.wikipedia.org/wiki/Oortsche_Wolke" title="Oortsche Wolke – colonianu" lang="ksh" hreflang="ksh" data-title="Oortsche Wolke" data-language-autonym="Ripoarisch" data-language-local-name="colonianu" class="interlanguage-link-target"><span>Ripoarisch</span></a></li><li class="interlanguage-link interwiki-la mw-list-item"><a href="https://la.wikipedia.org/wiki/Nubes_Oort" title="Nubes Oort – llatín" lang="la" hreflang="la" data-title="Nubes Oort" data-language-autonym="Latina" data-language-local-name="llatín" class="interlanguage-link-target"><span>Latina</span></a></li><li class="interlanguage-link interwiki-lb mw-list-item"><a href="https://lb.wikipedia.org/wiki/Oort-Wollek" title="Oort-Wollek – luxemburgués" lang="lb" hreflang="lb" data-title="Oort-Wollek" data-language-autonym="Lëtzebuergesch" data-language-local-name="luxemburgués" class="interlanguage-link-target"><span>Lëtzebuergesch</span></a></li><li class="interlanguage-link interwiki-li mw-list-item"><a href="https://li.wikipedia.org/wiki/Oortwolk" title="Oortwolk – limburgués" lang="li" hreflang="li" data-title="Oortwolk" data-language-autonym="Limburgs" data-language-local-name="limburgués" class="interlanguage-link-target"><span>Limburgs</span></a></li><li class="interlanguage-link interwiki-lmo mw-list-item"><a href="https://lmo.wikipedia.org/wiki/Nigol_de_Oort" title="Nigol de Oort – lombardu" lang="lmo" hreflang="lmo" data-title="Nigol de Oort" data-language-autonym="Lombard" data-language-local-name="lombardu" class="interlanguage-link-target"><span>Lombard</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Orto_kometoid%C5%B3_debesis" title="Orto kometoidų debesis – lituanu" lang="lt" hreflang="lt" data-title="Orto kometoidų debesis" data-language-autonym="Lietuvių" data-language-local-name="lituanu" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/Orta_m%C4%81konis" title="Orta mākonis – letón" lang="lv" hreflang="lv" data-title="Orta mākonis" data-language-autonym="Latviešu" data-language-local-name="letón" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-map-bms mw-list-item"><a href="https://map-bms.wikipedia.org/wiki/Awan_Oort" title="Awan Oort – Banyumasan" lang="jv-x-bms" hreflang="jv-x-bms" data-title="Awan Oort" data-language-autonym="Basa Banyumasan" data-language-local-name="Banyumasan" class="interlanguage-link-target"><span>Basa Banyumasan</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%9E%D1%80%D1%82%D0%BE%D0%B2_%D0%9E%D0%B1%D0%BB%D0%B0%D0%BA" title="Ортов Облак – macedoniu" lang="mk" hreflang="mk" data-title="Ортов Облак" data-language-autonym="Македонски" data-language-local-name="macedoniu" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikipedia.org/wiki/%E0%B4%92%E0%B5%BC%E0%B4%9F%E0%B5%8D%E0%B4%9F%E0%B5%8D_%E0%B4%AE%E0%B5%87%E0%B4%98%E0%B4%82" title="ഒർട്ട് മേഘം – malayalam" lang="ml" hreflang="ml" data-title="ഒർട്ട് മേഘം" data-language-autonym="മലയാളം" data-language-local-name="malayalam" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-mr mw-list-item"><a href="https://mr.wikipedia.org/wiki/%E0%A4%8A%E0%A4%B0%E0%A5%8D%E0%A4%9F%E0%A4%9A%E0%A4%BE_%E0%A4%AE%E0%A5%87%E0%A4%98" title="ऊर्टचा मेघ – marathi" lang="mr" hreflang="mr" data-title="ऊर्टचा मेघ" data-language-autonym="मराठी" data-language-local-name="marathi" class="interlanguage-link-target"><span>मराठी</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Awan_Oort" title="Awan Oort – malayu" lang="ms" hreflang="ms" data-title="Awan Oort" data-language-autonym="Bahasa Melayu" data-language-local-name="malayu" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-mt mw-list-item"><a href="https://mt.wikipedia.org/wiki/S%C4%A7aba_ta%27_Oort" title="Sħaba ta' Oort – maltés" lang="mt" hreflang="mt" data-title="Sħaba ta' Oort" data-language-autonym="Malti" data-language-local-name="maltés" class="interlanguage-link-target"><span>Malti</span></a></li><li class="interlanguage-link interwiki-my mw-list-item"><a href="https://my.wikipedia.org/wiki/%E1%80%A1%E1%80%B1%E1%80%AC%E1%80%90%E1%80%AD%E1%80%99%E1%80%BA%E1%80%90%E1%80%AD%E1%80%AF%E1%80%80%E1%80%BA" title="အောတိမ်တိုက် – birmanu" lang="my" hreflang="my" data-title="အောတိမ်တိုက်" data-language-autonym="မြန်မာဘာသာ" data-language-local-name="birmanu" class="interlanguage-link-target"><span>မြန်မာဘာသာ</span></a></li><li class="interlanguage-link interwiki-nds mw-list-item"><a href="https://nds.wikipedia.org/wiki/Oortsche_Wulk" title="Oortsche Wulk – baxu alemán" lang="nds" hreflang="nds" data-title="Oortsche Wulk" data-language-autonym="Plattdüütsch" data-language-local-name="baxu alemán" class="interlanguage-link-target"><span>Plattdüütsch</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Oortwolk" title="Oortwolk – neerlandés" lang="nl" hreflang="nl" data-title="Oortwolk" data-language-autonym="Nederlands" data-language-local-name="neerlandés" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Oortskya" title="Oortskya – noruegu Nynorsk" lang="nn" hreflang="nn" data-title="Oortskya" data-language-autonym="Norsk nynorsk" data-language-local-name="noruegu Nynorsk" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Oorts_sky" title="Oorts sky – noruegu Bokmål" lang="nb" hreflang="nb" data-title="Oorts sky" data-language-autonym="Norsk bokmål" data-language-local-name="noruegu Bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-oc mw-list-item"><a href="https://oc.wikipedia.org/wiki/N%C3%ADvol_d%27Oort" title="Nívol d'Oort – occitanu" lang="oc" hreflang="oc" data-title="Nívol d'Oort" data-language-autonym="Occitan" data-language-local-name="occitanu" class="interlanguage-link-target"><span>Occitan</span></a></li><li class="interlanguage-link interwiki-pl badge-Q17437796 badge-featuredarticle mw-list-item" title="artículos destacaos"><a href="https://pl.wikipedia.org/wiki/Ob%C5%82ok_Oorta" title="Obłok Oorta – polacu" lang="pl" hreflang="pl" data-title="Obłok Oorta" data-language-autonym="Polski" data-language-local-name="polacu" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pnb mw-list-item"><a href="https://pnb.wikipedia.org/wiki/%D8%A7%D9%88%D9%88%D8%B1%D9%B9_%D8%A8%D8%AF%D9%84" title="اوورٹ بدل – Western Punjabi" lang="pnb" hreflang="pnb" data-title="اوورٹ بدل" data-language-autonym="پنجابی" data-language-local-name="Western Punjabi" class="interlanguage-link-target"><span>پنجابی</span></a></li><li class="interlanguage-link interwiki-pt badge-Q17437796 badge-featuredarticle mw-list-item" title="artículos destacaos"><a href="https://pt.wikipedia.org/wiki/Nuvem_de_Oort" title="Nuvem de Oort – portugués" lang="pt" hreflang="pt" data-title="Nuvem de Oort" data-language-autonym="Português" data-language-local-name="portugués" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Norul_lui_Oort" title="Norul lui Oort – rumanu" lang="ro" hreflang="ro" data-title="Norul lui Oort" data-language-autonym="Română" data-language-local-name="rumanu" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%9E%D0%B1%D0%BB%D0%B0%D0%BA%D0%BE_%D0%9E%D0%BE%D1%80%D1%82%D0%B0" title="Облако Оорта – rusu" lang="ru" hreflang="ru" data-title="Облако Оорта" data-language-autonym="Русский" data-language-local-name="rusu" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-scn mw-list-item"><a href="https://scn.wikipedia.org/wiki/Nubbi_di_Oort" title="Nubbi di Oort – sicilianu" lang="scn" hreflang="scn" data-title="Nubbi di Oort" data-language-autonym="Sicilianu" data-language-local-name="sicilianu" class="interlanguage-link-target"><span>Sicilianu</span></a></li><li class="interlanguage-link interwiki-sco mw-list-item"><a href="https://sco.wikipedia.org/wiki/Oort_clood" title="Oort clood – scots" lang="sco" hreflang="sco" data-title="Oort clood" data-language-autonym="Scots" data-language-local-name="scots" class="interlanguage-link-target"><span>Scots</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Oortov_oblak" title="Oortov oblak – serbo-croata" lang="sh" hreflang="sh" data-title="Oortov oblak" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="serbo-croata" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Oort_cloud" title="Oort cloud – Simple English" lang="en-simple" hreflang="en-simple" data-title="Oort cloud" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Oortov_mrak_kom%C3%A9t" title="Oortov mrak komét – eslovacu" lang="sk" hreflang="sk" data-title="Oortov mrak komét" data-language-autonym="Slovenčina" data-language-local-name="eslovacu" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Oortov_oblak" title="Oortov oblak – eslovenu" lang="sl" hreflang="sl" data-title="Oortov oblak" data-language-autonym="Slovenščina" data-language-local-name="eslovenu" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%9E%D1%80%D1%82%D0%BE%D0%B2_%D0%BE%D0%B1%D0%BB%D0%B0%D0%BA" title="Ортов облак – serbiu" lang="sr" hreflang="sr" data-title="Ортов облак" data-language-autonym="Српски / srpski" data-language-local-name="serbiu" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Oorts_kometmoln" title="Oorts kometmoln – suecu" lang="sv" hreflang="sv" data-title="Oorts kometmoln" data-language-autonym="Svenska" data-language-local-name="suecu" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-sw mw-list-item"><a href="https://sw.wikipedia.org/wiki/Wingu_la_Oort" title="Wingu la Oort – suaḥili" lang="sw" hreflang="sw" data-title="Wingu la Oort" data-language-autonym="Kiswahili" data-language-local-name="suaḥili" class="interlanguage-link-target"><span>Kiswahili</span></a></li><li class="interlanguage-link interwiki-te mw-list-item"><a href="https://te.wikipedia.org/wiki/%E0%B0%8A%E0%B0%B0%E0%B1%8D%E0%B0%9F%E0%B1%8D_%E0%B0%AE%E0%B1%87%E0%B0%98%E0%B0%82" title="ఊర్ట్ మేఘం – telugu" lang="te" hreflang="te" data-title="ఊర్ట్ మేఘం" data-language-autonym="తెలుగు" data-language-local-name="telugu" class="interlanguage-link-target"><span>తెలుగు</span></a></li><li class="interlanguage-link interwiki-tg mw-list-item"><a href="https://tg.wikipedia.org/wiki/%D0%90%D0%B1%D1%80%D0%B8_%D0%BE%D0%BE%D1%80%D1%82" title="Абри оорт – taxiquistanín" lang="tg" hreflang="tg" data-title="Абри оорт" data-language-autonym="Тоҷикӣ" data-language-local-name="taxiquistanín" class="interlanguage-link-target"><span>Тоҷикӣ</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B9%80%E0%B8%A1%E0%B8%86%E0%B8%AD%E0%B8%AD%E0%B8%A3%E0%B9%8C%E0%B8%95" title="เมฆออร์ต – tailandés" lang="th" hreflang="th" data-title="เมฆออร์ต" data-language-autonym="ไทย" data-language-local-name="tailandés" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tl mw-list-item"><a href="https://tl.wikipedia.org/wiki/Ulap_na_Oort" title="Ulap na Oort – tagalog" lang="tl" hreflang="tl" data-title="Ulap na Oort" data-language-autonym="Tagalog" data-language-local-name="tagalog" class="interlanguage-link-target"><span>Tagalog</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Oort_bulutu" title="Oort bulutu – turcu" lang="tr" hreflang="tr" data-title="Oort bulutu" data-language-autonym="Türkçe" data-language-local-name="turcu" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-tt mw-list-item"><a href="https://tt.wikipedia.org/wiki/%D0%9E%D0%BE%D1%80%D1%82_%D0%B1%D0%BE%D0%BB%D1%8B%D1%82%D1%8B" title="Оорт болыты – tártaru" lang="tt" hreflang="tt" data-title="Оорт болыты" data-language-autonym="Татарча / tatarça" data-language-local-name="tártaru" class="interlanguage-link-target"><span>Татарча / tatarça</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%A5%D0%BC%D0%B0%D1%80%D0%B0_%D0%9E%D0%BE%D1%80%D1%82%D0%B0" title="Хмара Оорта – ucraín" lang="uk" hreflang="uk" data-title="Хмара Оорта" data-language-autonym="Українська" data-language-local-name="ucraín" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-ur mw-list-item"><a href="https://ur.wikipedia.org/wiki/%D8%A7%D9%88%D8%B1%D8%AA_%D8%A8%D8%A7%D8%AF%D9%84" title="اورت بادل – urdu" lang="ur" hreflang="ur" data-title="اورت بادل" data-language-autonym="اردو" data-language-local-name="urdu" class="interlanguage-link-target"><span>اردو</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/Oort_buluti" title="Oort buluti – uzbequistanín" lang="uz" hreflang="uz" data-title="Oort buluti" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="uzbequistanín" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-vec mw-list-item"><a href="https://vec.wikipedia.org/wiki/Nube_de_Oort" title="Nube de Oort – venecianu" lang="vec" hreflang="vec" data-title="Nube de Oort" data-language-autonym="Vèneto" data-language-local-name="venecianu" class="interlanguage-link-target"><span>Vèneto</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/%C4%90%C3%A1m_m%C3%A2y_Oort" title="Đám mây Oort – vietnamín" lang="vi" hreflang="vi" data-title="Đám mây Oort" data-language-autonym="Tiếng Việt" data-language-local-name="vietnamín" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-war mw-list-item"><a href="https://war.wikipedia.org/wiki/Dampog_Oort" title="Dampog Oort – waray" lang="war" hreflang="war" data-title="Dampog Oort" data-language-autonym="Winaray" data-language-local-name="waray" class="interlanguage-link-target"><span>Winaray</span></a></li><li class="interlanguage-link interwiki-wuu mw-list-item"><a href="https://wuu.wikipedia.org/wiki/%E5%A5%A5%E5%B0%94%E7%89%B9%E4%BA%91" title="奥尔特云 – chinu wu" lang="wuu" hreflang="wuu" data-title="奥尔特云" data-language-autonym="吴语" data-language-local-name="chinu wu" class="interlanguage-link-target"><span>吴语</span></a></li><li class="interlanguage-link interwiki-xmf mw-list-item"><a href="https://xmf.wikipedia.org/wiki/%E1%83%9D%E1%83%9D%E1%83%A0%E1%83%A2%E1%83%90%E1%83%A8_%E1%83%9B%E1%83%A3%E1%83%9C%E1%83%90%E1%83%A4%E1%83%90" title="ოორტაშ მუნაფა – mingrelianu" lang="xmf" hreflang="xmf" data-title="ოორტაშ მუნაფა" data-language-autonym="მარგალური" data-language-local-name="mingrelianu" class="interlanguage-link-target"><span>მარგალური</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E5%A5%A5%E5%B0%94%E7%89%B9%E4%BA%91" title="奥尔特云 – chinu" lang="zh" hreflang="zh" data-title="奥尔特云" data-language-autonym="中文" data-language-local-name="chinu" class="interlanguage-link-target"><span>中文</span></a></li><li class="interlanguage-link interwiki-zh-min-nan mw-list-item"><a href="https://zh-min-nan.wikipedia.org/wiki/Oort_h%C3%BBn" title="Oort hûn – chinu min nan" lang="nan" hreflang="nan" data-title="Oort hûn" data-language-autonym="閩南語 / Bân-lâm-gú" data-language-local-name="chinu min nan" class="interlanguage-link-target"><span>閩南語 / Bân-lâm-gú</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E6%AD%90%E7%89%B9%E6%98%9F%E9%9B%B2" title="歐特星雲 – cantonés" lang="yue" hreflang="yue" data-title="歐特星雲" data-language-autonym="粵語" data-language-local-name="cantonés" class="interlanguage-link-target"><span>粵語</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q40864#sitelinks-wikipedia" title="Editar los enllaces d'interllingua" class="wbc-editpage">Editar los enllaces</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Espacios de nome"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet 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class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">asturianu</span> </label> <div class="vector-dropdown-content"> <div id="p-variants" class="vector-menu mw-portlet mw-portlet-variants emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> </div> </div> </nav> </div> <div id="right-navigation" class="vector-collapsible"> <nav aria-label="Vistes"> <div id="p-views" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-views" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-view" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Nube_d%27Oort"><span>Lleer</span></a></li><li id="ca-ve-edit" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Nube_d%27Oort&veaction=edit" title="Editar esta páxina [v]" 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class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">Ferramientes</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-tools-unpinned-container" class="vector-unpinned-container"> <div id="vector-page-tools" class="vector-page-tools vector-pinnable-element"> <div class="vector-pinnable-header vector-page-tools-pinnable-header vector-pinnable-header-unpinned" data-feature-name="page-tools-pinned" data-pinnable-element-id="vector-page-tools" data-pinned-container-id="vector-page-tools-pinned-container" data-unpinned-container-id="vector-page-tools-unpinned-container" > <div class="vector-pinnable-header-label">Ferramientes</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">mover a la barra llateral</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">despintar</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="Más opciones" > <div class="vector-menu-heading"> Aiciones </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-more-view" class="selected vector-more-collapsible-item mw-list-item"><a href="/wiki/Nube_d%27Oort"><span>Lleer</span></a></li><li id="ca-more-ve-edit" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Nube_d%27Oort&veaction=edit" title="Editar esta páxina [v]" accesskey="v"><span>Editar</span></a></li><li id="ca-more-edit" class="collapsible vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Nube_d%27Oort&action=edit" title="Editar el códigu fonte d'esta páxina [e]" accesskey="e"><span>Editar la fonte</span></a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Nube_d%27Oort&action=history"><span>Ver historial</span></a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> Xeneral </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Especial:LoQueEnlazaAqu%C3%AD/Nube_d%27Oort" title="Llista de toles páxines wiki qu'enllacien equí [j]" accesskey="j"><span>Lo qu'enllaza equí</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Especial:CambiosEnEnlazadas/Nube_d%27Oort" rel="nofollow" title="Cambios recientes nes páxines enllazaes dende esta [k]" accesskey="k"><span>Cambios rellacionaos</span></a></li><li id="t-upload" class="mw-list-item"><a href="//commons.wikimedia.org/wiki/Special:UploadWizard?uselang=ast" title="Xubir ficheros [u]" accesskey="u"><span>Xubir ficheru</span></a></li><li id="t-specialpages" class="mw-list-item"><a href="/wiki/Especial:P%C3%A1ginasEspeciales" title="Llista de toles páxines especiales [q]" accesskey="q"><span>Páxines especiales</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=Nube_d%27Oort&oldid=4283186" title="Enllaz permanente a esta revisión de la páxina"><span>Enllaz permanente</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=Nube_d%27Oort&action=info" title="Más información sobro esta páxina"><span>Información de la páxina</span></a></li><li id="t-cite" class="mw-list-item"><a href="/w/index.php?title=Especial:Citar&page=Nube_d%27Oort&id=4283186&wpFormIdentifier=titleform" title="Información tocante a cómo citar esta páxina"><span>Citar esta páxina</span></a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=Especial:Acortador_de_URL&url=https%3A%2F%2Fast.wikipedia.org%2Fwiki%2FNube_d%2527Oort"><span>Llograr la URL encurtiada</span></a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=Especial:QrCode&url=https%3A%2F%2Fast.wikipedia.org%2Fwiki%2FNube_d%2527Oort"><span>Xenerar códigu QR</span></a></li> </ul> </div> </div> <div id="p-coll-print_export" class="vector-menu mw-portlet mw-portlet-coll-print_export" > <div class="vector-menu-heading"> Imprentar/esportar </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="coll-create_a_book" class="mw-list-item"><a href="/w/index.php?title=Especial:Libro&bookcmd=book_creator&referer=Nube+d%27Oort"><span>Crear un llibru</span></a></li><li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=Especial:DownloadAsPdf&page=Nube_d%27Oort&action=show-download-screen"><span>Descargar como PDF</span></a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=Nube_d%27Oort&printable=yes" title="Versión imprentable d'esta páxina [p]" accesskey="p"><span>Versión pa imprentar</span></a></li> </ul> </div> </div> <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects" > <div class="vector-menu-heading"> N'otros proyeutos </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="wb-otherproject-link wb-otherproject-commons mw-list-item"><a href="https://commons.wikimedia.org/wiki/Category:Oort_cloud" hreflang="en"><span>Wikimedia Commons</span></a></li><li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q40864" title="Enllaz al elementu del depósitu de datos coneutáu [g]" accesskey="g"><span>Elementu de Wikidata</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Ferramientes de páxina"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Apariencia"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Apariencia</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">mover a la barra llateral</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">despintar</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">De Wikipedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="ast" dir="ltr"><table class="infobox plantia-oxetuceleste" style="font-size:90%;width:25em"><tbody><tr><th colspan="2" style="text-align:center;font-size:125%;font-weight:bold;background:#b0d1ad"><span style="float:right"><span typeof="mw:File"><span title="Ficha d'oxetu celeste"><img alt="Ficha d'oxetu celeste" src="//upload.wikimedia.org/wikipedia/commons/thumb/a/ac/Galaxy_symbol_%28fixed_width%29.svg/25px-Galaxy_symbol_%28fixed_width%29.svg.png" decoding="async" width="25" height="25" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/ac/Galaxy_symbol_%28fixed_width%29.svg/38px-Galaxy_symbol_%28fixed_width%29.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/ac/Galaxy_symbol_%28fixed_width%29.svg/50px-Galaxy_symbol_%28fixed_width%29.svg.png 2x" data-file-width="16" data-file-height="16" /></span></span></span>Nube d'Oort</th></tr><tr><td colspan="2" style="text-align:center;background:#b0d1ad7d"> <a href="/wiki/Oxetu_tresneptunianu" title="Oxetu tresneptunianu">Oxetu tresneptunianu</a> y <a href="https://www.wikidata.org/wiki/Special:EntityPage/Q18706315" class="extiw" title="d:Special:EntityPage/Q18706315">entidad hipotética</a> <sup>(es)</sup> <span class="mw-valign-baseline skin-invert" typeof="mw:File"><a href="https://www.wikidata.org/wiki/Q18706315?uselang=ast" title="Traducir"><img alt="Traducir" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/70/Noun_Project_label_icon_1116097_cc_mirror.svg/10px-Noun_Project_label_icon_1116097_cc_mirror.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/70/Noun_Project_label_icon_1116097_cc_mirror.svg/15px-Noun_Project_label_icon_1116097_cc_mirror.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/70/Noun_Project_label_icon_1116097_cc_mirror.svg/20px-Noun_Project_label_icon_1116097_cc_mirror.svg.png 2x" data-file-width="158" data-file-height="161" /></a></span></td></tr><tr><th scope="row" style="text-align:left;background:#eeeeee">Parte de</th><td> <a href="/wiki/Sistema_solar_esterior" title="Sistema solar esterior">Sistema solar esterior</a></td></tr><tr><th scope="row" style="text-align:left;background:#eeeeee">Descubridor</th><td> <a href="https://www.wikidata.org/wiki/Special:EntityPage/Q309861" class="extiw" title="d:Special:EntityPage/Q309861">Jan Hendrik Oort</a></td></tr><tr><th scope="row" style="text-align:left;background:#eeeeee"><a href="/wiki/Ep%C3%B3nimu" title="Epónimu">Epónimu</a></th><td> <a href="https://www.wikidata.org/wiki/Special:EntityPage/Q309861" class="extiw" title="d:Special:EntityPage/Q309861">Jan Hendrik Oort</a> y <a href="https://www.wikidata.org/wiki/Special:EntityPage/Q318126" class="extiw" title="d:Special:EntityPage/Q318126">Ernst Öpik</a> <sup>(es)</sup> <span class="mw-valign-baseline skin-invert" typeof="mw:File"><a href="https://www.wikidata.org/wiki/Q318126?uselang=ast" title="Traducir"><img alt="Traducir" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/70/Noun_Project_label_icon_1116097_cc_mirror.svg/10px-Noun_Project_label_icon_1116097_cc_mirror.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/70/Noun_Project_label_icon_1116097_cc_mirror.svg/15px-Noun_Project_label_icon_1116097_cc_mirror.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/70/Noun_Project_label_icon_1116097_cc_mirror.svg/20px-Noun_Project_label_icon_1116097_cc_mirror.svg.png 2x" data-file-width="158" data-file-height="161" /></a></span></td></tr><tr><th scope="row" style="text-align:left;background:#eeeeee">Oxetu astronómicu padre</th><td> <a href="/wiki/Sol" title="Sol">Sol</a></td></tr><tr><td colspan="2" style="text-align:right"><span typeof="mw:File"><a href="https://www.wikidata.org/wiki/Q40864" title="Cambiar los datos en Wikidata"><img alt="Cambiar los datos en Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/12px-Arbcom_ru_editing.svg.png" decoding="async" width="12" height="12" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/18px-Arbcom_ru_editing.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/24px-Arbcom_ru_editing.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></td></tr></tbody></table> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Ficheru:Kuiper_belt_-_Oort_cloud-es.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/2/2f/Kuiper_belt_-_Oort_cloud-es.svg/290px-Kuiper_belt_-_Oort_cloud-es.svg.png" decoding="async" width="290" height="249" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/2f/Kuiper_belt_-_Oort_cloud-es.svg/435px-Kuiper_belt_-_Oort_cloud-es.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/2f/Kuiper_belt_-_Oort_cloud-es.svg/580px-Kuiper_belt_-_Oort_cloud-es.svg.png 2x" data-file-width="512" data-file-height="439" /></a><figcaption>Imaxe artística del <a href="/wiki/Cintur%C3%B3n_de_Kuiper" title="Cinturón de Kuiper">cinturón de Kuiper</a> y de la nube d'Oort.</figcaption></figure> <p>La <b>nube d'Oort</b> (tamién llamada <b>nube de Öpik-Oort</b>, n'honor a <a href="/w/index.php?title=Ernst_%C3%96pik&action=edit&redlink=1" class="new" title="Ernst Öpik (la páxina nun esiste)">Ernst Öpik</a> y <a href="/w/index.php?title=Jan_Oort&action=edit&redlink=1" class="new" title="Jan Oort (la páxina nun esiste)">Jan Oort</a>) ye una nube esférica d'<a href="/wiki/Oxetu_tresneptunianu" title="Oxetu tresneptunianu">oxetos tresneptunianos</a> hipotética (esto ye, non reparada direutamente) que s'atopa nes llendes del <a href="/wiki/Sistema_solar" class="mw-redirect" title="Sistema solar">sistema solar</a>, casi a un <a href="/wiki/A%C3%B1u_lluz" title="Añu lluz">añu lluz</a> del <a href="/wiki/Sol" title="Sol">Sol</a>, y aproximao a un cuartu de la distancia del sol a <a href="/wiki/Pr%C3%B3xima_Centauri" class="mw-redirect" title="Próxima Centauri">Próxima Centauri</a>, la estrella más cercana al nuesu sistema solar. Les otres dos acumuladures conocíes d'<a href="/wiki/Oxetu_tresneptunianu" title="Oxetu tresneptunianu">oxetos tresneptunianos</a>, el <a href="/wiki/Cintur%C3%B3n_de_Kuiper" title="Cinturón de Kuiper">cinturón de Kuiper</a> y el <a href="/w/index.php?title=Discu_esvalix%C3%A1u&action=edit&redlink=1" class="new" title="Discu esvalixáu (la páxina nun esiste)">discu esvalixáu</a>, tán asitiaes unos cien vegaes más cerca del Sol que la nube d'Oort. Según delles estimaciones estadístiques, la nube podría allugar ente unu y cien billones (10<sup>12</sup> - 10<sup>14</sup>) d'oxetos, siendo la so masa unu cinco veces la de la Tierra </p><p>Presenta dos rexones estremaes: la nube d'Oort esterior, de forma esférica, y la nube d'Oort interior, tamién llamada <i><a href="/w/index.php?title=Nube_de_Hills&action=edit&redlink=1" class="new" title="Nube de Hills (la páxina nun esiste)">nube de Hills</a></i>, en forma de discu. Los oxetos de la nube tán formaos por compuestos como <a href="/wiki/Xelu" title="Xelu">xelu</a>, <a href="/wiki/Metanu" title="Metanu">metanu</a> y <a href="/wiki/Amoniacu" title="Amoniacu">amoniacu</a>, ente otros, y formáronse mui cerca del Sol cuando'l sistema solar inda taba nes sos primeres etapes de formación. Una vegada formaos, llegaron a la so posición actual na nube d'Oort por causa de los <a href="/wiki/Graved%C3%A1" title="Gravedá">efeutos gravitatorios</a> de los <a href="/wiki/Xigante_gaseosu" title="Xigante gaseosu">planetes xigantes</a>.<sup id="cite_ref-Morbidelli2005_1-0" class="reference"><a href="#cite_note-Morbidelli2005-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p><p>A pesar de que la nube d'Oort, como se dixo, nun se reparó direutamente (un cuerpu neses distancies ye imposible de detectar hasta en rayos X), los astrónomos creen que ye la fonte de tolos cometes de periodu llargu y de tipu <a href="/wiki/Cometa_Halley" title="Cometa Halley">Halley</a>, y de dalgunos <a href="/wiki/Centauru_(astronom%C3%ADa)" title="Centauru (astronomía)">centauros</a> y cometes de <a href="/wiki/X%C3%BApiter_(planeta)" title="Xúpiter (planeta)">Xúpiter</a>.<sup id="cite_ref-Emelyanenko2007_2-0" class="reference"><a href="#cite_note-Emelyanenko2007-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> Los oxetos de la nube d'Oort esterior atópense bien pocu amestaos gravitacionalmente al Sol, y esto fai qu'otres estrelles, ya inclusive la mesma <a href="/wiki/V%C3%ADa_L%C3%A1ctea" class="mw-redirect" title="Vía Láctea">Vía Láctea</a>, puedan afectalos y provocar que salgan despidíos escontra'l sistema solar interior.<sup id="cite_ref-Morbidelli2005_1-1" class="reference"><a href="#cite_note-Morbidelli2005-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> La mayoría de los cometes de periodu curtiu aniciar nel <a href="/w/index.php?title=Discu_esvalix%C3%A1u&action=edit&redlink=1" class="new" title="Discu esvalixáu (la páxina nun esiste)">discu esvalixáu</a>, pero créese que, aun así, esiste un gran númberu d'ellos que tienen el so orixe na nube d'Oort.<sup id="cite_ref-Morbidelli2005_1-2" class="reference"><a href="#cite_note-Morbidelli2005-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Emelyanenko2007_2-1" class="reference"><a href="#cite_note-Emelyanenko2007-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> A pesar de que tanto'l <a href="/wiki/Cintur%C3%B3n_de_Kuiper" title="Cinturón de Kuiper">cinturón de Kuiper</a> como'l discu esvalixáu reparáronse, estudiáu, y tamién clasificáu munchos de los sos componentes, namái tenemos evidencia na nube d'Oort de cinco posibles miembros: <a href="/w/index.php?title=(90377)_Sedna&action=edit&redlink=1" class="new" title="(90377) Sedna (la páxina nun esiste)">(90377) Sedna</a>, <a href="/w/index.php?title=(148209)_2000_CR105&action=edit&redlink=1" class="new" title="(148209) 2000 CR105 (la páxina nun esiste)"><span style="white-space:nowrap">(148209) 2000 CR<sub>105</sub></span></a>, <a href="/w/index.php?title=(308933)_2006_SQ372&action=edit&redlink=1" class="new" title="(308933) 2006 SQ372 (la páxina nun esiste)"><span style="white-space:nowrap">(308933) 2006 SQ<sub>372</sub></span></a>, <a href="/w/index.php?title=2008_KV42&action=edit&redlink=1" class="new" title="2008 KV42 (la páxina nun esiste)"><span style="white-space:nowrap">2008 KV<sub>42</sub></span></a> y un nuevu oxetu descubiertu'l 10 de payares de 2015 entá ensin nomar. Toos ellos atópense na <a href="/w/index.php?title=Nube_de_Hills&action=edit&redlink=1" class="new" title="Nube de Hills (la páxina nun esiste)">nube d'Oort interior</a>.<sup id="cite_ref-Morbidelli2004_3-0" class="reference"><a href="#cite_note-Morbidelli2004-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> El 26 de marzu de 2014 anuncióse'l descubrimientu d'un nuevu oxetu, que sería'l segundu más grande de la nube tres Sedna, identificáu como <a href="/w/index.php?title=2012_VP113&action=edit&redlink=1" class="new" title="2012 VP113 (la páxina nun esiste)"><span style="white-space:nowrap">2012 VP<sub>113</sub></span></a>.<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> El 10 de payares de 2015 la revista <a href="/wiki/Nature" title="Nature">Nature</a> publicaba anunciando'l descubrimientu d'un nuevu oxetu tresneptunianu alcontráu nos márxenes inferiores de la nube d'Oort. Dichu oxetu sería'l más alloñáu del <a href="/wiki/Sistema_solar" class="mw-redirect" title="Sistema solar">sistema solar</a>, récor qu'antes ostentaba'l planeta nanu <a href="/wiki/Eris_(planeta_nanu)" class="mw-redirect" title="Eris (planeta nanu)">Eris</a>.<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Primeres_hipótesis"><span id="Primeres_hip.C3.B3tesis"></span>Primeres hipótesis</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Nube_d%27Oort&veaction=edit&section=1" title="Editar seición: Primeres hipótesis" class="mw-editsection-visualeditor"><span>editar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Nube_d%27Oort&action=edit&section=1" title="Editar el código fuente de la sección: Primeres hipótesis"><span>editar la fonte</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>En <a href="/wiki/1932" title="1932">1932</a>, l'astrónomu <a href="/wiki/Estonia" title="Estonia">estoniu</a> <a href="/w/index.php?title=Ernst_%C3%96pik&action=edit&redlink=1" class="new" title="Ernst Öpik (la páxina nun esiste)">Ernst Öpik</a> postuló que los cometes de periodu llargu aniciar nuna nube que orbitaba nes llendes del sistema solar.<sup id="cite_ref-Opik1932_6-0" class="reference"><a href="#cite_note-Opik1932-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> En <a href="/wiki/1950" title="1950">1950</a>, l'astrónomu <a href="/wiki/Pa%C3%ADses_Baxos" title="Países Baxos">holandés</a> <a href="/w/index.php?title=Jan_Hendrik_Oort&action=edit&redlink=1" class="new" title="Jan Hendrik Oort (la páxina nun esiste)">Jan Oort</a> postuló la teoría de manera independiente pa resolver una paradoxa.<sup id="cite_ref-Oort1950_7-0" class="reference"><a href="#cite_note-Oort1950-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> Les órbites de los cometes son bien inestables, siendo la <a href="/w/index.php?title=Din%C3%A1mica&action=edit&redlink=1" class="new" title="Dinámica (la páxina nun esiste)">dinámica</a> la que dictamina si van topetar col <a href="/wiki/Sol" title="Sol">Sol</a> o con cualesquier otru <a href="/wiki/Planeta" title="Planeta">planeta</a>, o si van salir despidíos del sistema solar por cuenta de les <a href="/w/index.php?title=Perturbaci%C3%B3n_(astronom%C3%ADa)&action=edit&redlink=1" class="new" title="Perturbación (astronomía) (la páxina nun esiste)">perturbaciones de los planetes</a>. Amás, al tar formaos na so mayor parte por <a href="/wiki/Xelu" title="Xelu">xelu</a> y otros elementos volátiles, éstos van esprendiendo gradualmente por cuenta de la <a href="/wiki/Radiaci%C3%B3n_electromagn%C3%A9tico" title="Radiación electromagnético">radiación electromagnético</a> hasta que'l cometa estrémase o adquier una corteza aislante que frena la desgasificación. D'esta miente, Oort razonó que los cometes nun pudieron formase na so órbita actual, y que debíen de permanecer mientres tola so esistencia nun alloñáu depósitu apináu d'estos cuerpos celestes, cayendo col tiempu escontra'l sistema solar y convirtiéndose en cometes de periodu llargu.<sup id="cite_ref-Oort1950_7-1" class="reference"><a href="#cite_note-Oort1950-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Jewitt2002_8-0" class="reference"><a href="#cite_note-Jewitt2002-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Enciclopedia_9-0" class="reference"><a href="#cite_note-Enciclopedia-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> </p><p>Esisten dos tipos de cometes: los de periodu curtiu (tamién llamaos cometes <a href="/wiki/Ecl%C3%ADptica" title="Eclíptica">eclípticos</a>), que presenten órbites per debaxo de les 10 <a href="/wiki/Unid%C3%A1_astron%C3%B3mica" title="Unidá astronómica">ua</a>, y los de periodu llargu (cometes casi <a href="/w/index.php?title=Isotrop%C3%ADa&action=edit&redlink=1" class="new" title="Isotropía (la páxina nun esiste)">isótropos</a>), que tienen órbites de más de 1000 ua. Oort investigó los cometes casi isótropos, y atopó que la mayoría d'ellos teníen un <a href="/w/index.php?title=Afelio&action=edit&redlink=1" class="new" title="Afelio (la páxina nun esiste)">afelio</a> (la so distancia más alloñada al Sol) d'aproximao 20 000 ua y paecíen provenir de toes direiciones, lo cual fortalecía la so hipótesis y suxería un depósitu de forma esférica. Los escasos cometes que teníen afelios de 10 000 ua tuvieron de pasar en dalgún momentu mui cerca del sistema solar, siendo influyíos pola gravedá de los planetes y polo tanto faciendo más pequeña la so órbita.<sup id="cite_ref-Enciclopedia_9-1" class="reference"><a href="#cite_note-Enciclopedia-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Composición_y_estructura"><span id="Composici.C3.B3n_y_estructura"></span>Composición y estructura</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Nube_d%27Oort&veaction=edit&section=2" title="Editar seición: Composición y estructura" class="mw-editsection-visualeditor"><span>editar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Nube_d%27Oort&action=edit&section=2" title="Editar el código fuente de la sección: Composición y estructura"><span>editar la fonte</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/Ficheru:Oort_cloud_Sedna_orbit-es.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/d/d7/Oort_cloud_Sedna_orbit-es.svg/300px-Oort_cloud_Sedna_orbit-es.svg.png" decoding="async" width="300" height="300" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/d7/Oort_cloud_Sedna_orbit-es.svg/450px-Oort_cloud_Sedna_orbit-es.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/d7/Oort_cloud_Sedna_orbit-es.svg/600px-Oort_cloud_Sedna_orbit-es.svg.png 2x" data-file-width="2499" data-file-height="2499" /></a><figcaption>Alloña de la nube d'Oort respectu del restu de cuerpos del sistema solar.</figcaption></figure> <p>Créese que la nube d'Oort estender dende 2000 ua o 5000 ua<sup id="cite_ref-Enciclopedia_9-2" class="reference"><a href="#cite_note-Enciclopedia-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> hasta 50 000 ua<sup id="cite_ref-Morbidelli2005_1-3" class="reference"><a href="#cite_note-Morbidelli2005-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> del Sol, anque delles fontes asitien la so llende ente 100 000 ua y 200 000 ua.<sup id="cite_ref-Enciclopedia_9-3" class="reference"><a href="#cite_note-Enciclopedia-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> La nube d'Oort puede estremase en dos rexones: la nube d'Oort esterior (ente 20 000 ua y 50 000 ua), de forma esférica, y la nube d'Oort interior (ente 2000 ua y 20 000 ua), que tien forma <a href="/w/index.php?title=Toru_(xeometr%C3%ADa)&action=edit&redlink=1" class="new" title="Toru (xeometría) (la páxina nun esiste)">toroidal</a>. </p><p>La nube esterior atópase bien pocu amestada al Sol y ye la fonte de la mayor parte de los cometes de periodu llargu.<sup id="cite_ref-Morbidelli2005_1-4" class="reference"><a href="#cite_note-Morbidelli2005-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> La nube interior tamién se conoz como <a href="/w/index.php?title=Nube_de_Hills&action=edit&redlink=1" class="new" title="Nube de Hills (la páxina nun esiste)">nube de Hills</a>, n'honor a <a href="/w/index.php?title=Jack_G._Hills&action=edit&redlink=1" class="new" title="Jack G. Hills (la páxina nun esiste)">Jack G. Hills</a>, l'astrónomu que propunxo la so esistencia en <a href="/wiki/1981" title="1981">1981</a>.<sup id="cite_ref-Hills1981_10-0" class="reference"><a href="#cite_note-Hills1981-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> Los modelos predicen que la nube interior tendría de tener decenes o cientos de vegaes más oxetos que la nube esterior;<sup id="cite_ref-Hills1981_10-1" class="reference"><a href="#cite_note-Hills1981-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Levison2001_11-0" class="reference"><a href="#cite_note-Levison2001-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-NAS1991_12-0" class="reference"><a href="#cite_note-NAS1991-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> paez ser que la nube de Hills reabastece de cometes a la nube esterior a midida que vanse escosando y esplica la esistencia de la nube d'Oort tres miles de millones d'años.<sup id="cite_ref-Fernandez2002_13-0" class="reference"><a href="#cite_note-Fernandez2002-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup> </p><p>Créese que la nube d'Oort puede allugar dellos billones de cuerpos de más de 1,3 <a href="/wiki/Quil%C3%B3metru" title="Quilómetru">quilómetros</a> de diámetru y quinientos mil millones con una <a href="/wiki/Magnit%C3%BA_absoluta" title="Magnitú absoluta">magnitú absoluta</a> menor a +10,9 (cuanto menor ye'l valor, mayor ye'l rellumu).<sup id="cite_ref-Morbidelli2005_1-5" class="reference"><a href="#cite_note-Morbidelli2005-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-14" class="reference"><a href="#cite_note-14"><span class="cite-bracket">[</span>Nota 1<span class="cite-bracket">]</span></a></sup> A pesar del númberu tan alzáu de cuerpos, cada unu d'ellos taría dixebráu en permediu delles decenes de millones de quilómetros con respectu al más cercanu.<sup id="cite_ref-Emelyanenko2007_2-2" class="reference"><a href="#cite_note-Emelyanenko2007-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-SciAmerican_15-0" class="reference"><a href="#cite_note-SciAmerican-15"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> La masa de la nube d'Oort nun se sabe con certidume, pero si toma'l <a href="/wiki/Cometa_Halley" title="Cometa Halley">cometa Halley</a> como prototipu d'oxetu de la nube esterior, envalórase que la masa sería de 3x10<sup>25</sup> kg, unos cinco vegaes la de la <a href="/wiki/Tierra" title="Tierra">Tierra</a>.<sup id="cite_ref-Morbidelli2005_1-6" class="reference"><a href="#cite_note-Morbidelli2005-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Weissman1983_16-0" class="reference"><a href="#cite_note-Weissman1983-16"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup> Enantes pensábase que la so masa podría aportar a hasta trescientes ochenta vegaes la masa terrestre,<sup id="cite_ref-Buhai_17-0" class="reference"><a href="#cite_note-Buhai-17"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup> pero la nuesa comprensión de la distribución de tamaños de los cometes de periodu llargu amenorgó les estimaciones. Anguaño la masa de la nube d'Oort interior sigue siendo desconocida. </p><p>Si los cometes que s'analizaron conformen una estimación de los que s'atopen na nube d'Oort, la gran mayoría taríen formaos por <a href="/wiki/Xelu" title="Xelu">xelu</a>, <a href="/wiki/Metanu" title="Metanu">metanu</a>, <a href="/wiki/Etanu" title="Etanu">etanu</a>, <a href="/wiki/Mon%C3%B3xidu_de_carbonu" title="Monóxidu de carbonu">monóxidu de carbonu</a> y <a href="/w/index.php?title=%C3%81cidu_cianh%C3%ADdrico&action=edit&redlink=1" class="new" title="Ácidu cianhídrico (la páxina nun esiste)">ácidu cianhídrico</a>.<sup id="cite_ref-Gibb2003_18-0" class="reference"><a href="#cite_note-Gibb2003-18"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup> Sicasí, el descubrimientu del <a href="/wiki/Oxetu_tresneptunianu" title="Oxetu tresneptunianu">oxetu tresneptunianu</a> <a href="/w/index.php?title=1996_PW&action=edit&redlink=1" class="new" title="1996 PW (la páxina nun esiste)">1996 PW</a>, que tien una órbita más carauterística d'un cometa de periodu llargu, suxer que la nube tamién alluga oxetos predresos.<sup id="cite_ref-Weissman1997_19-0" class="reference"><a href="#cite_note-Weissman1997-19"><span class="cite-bracket">[</span>18<span class="cite-bracket">]</span></a></sup> Los analises de los <a href="/wiki/Is%C3%B3topu" title="Isótopu">isótopos</a> de <a href="/wiki/Carbonu" title="Carbonu">carbonu</a> y <a href="/wiki/Nitr%C3%B3xenu" title="Nitróxenu">nitróxenu</a> revelen qu'apenes esisten diferencies ente los cometes de la nube d'Oort y los cometes de Xúpiter, a pesar de les enormes distancies que los dixebren. Esti fechu suxer que toos ellos formáronse na nube protosolar, mientres la formación del sistema solar.<sup id="cite_ref-Hutsemekers2005_20-0" class="reference"><a href="#cite_note-Hutsemekers2005-20"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Neslusan2000_21-0" class="reference"><a href="#cite_note-Neslusan2000-21"><span class="cite-bracket">[</span>20<span class="cite-bracket">]</span></a></sup> Estes conclusiones son tamién aceptaes polos estudios del tamañu granular nes cometes de la nube d'Oort,<sup id="cite_ref-Ootsubo2007_22-0" class="reference"><a href="#cite_note-Ootsubo2007-22"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup> según tamién pol estudiu de los impautos del cometa <a href="/w/index.php?title=9P/Tempel_1&action=edit&redlink=1" class="new" title="9P/Tempel 1 (la páxina nun esiste)">9P/Tempel 1</a>.<sup id="cite_ref-Mumma2005_23-0" class="reference"><a href="#cite_note-Mumma2005-23"><span class="cite-bracket">[</span>22<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Orixe">Orixe</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Nube_d%27Oort&veaction=edit&section=3" title="Editar seición: Orixe" class="mw-editsection-visualeditor"><span>editar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Nube_d%27Oort&action=edit&section=3" title="Editar el código fuente de la sección: Orixe"><span>editar la fonte</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Ficheru:Protoplanetary_disk.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/e/e8/Protoplanetary_disk.jpg/220px-Protoplanetary_disk.jpg" decoding="async" width="220" height="147" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/e8/Protoplanetary_disk.jpg/330px-Protoplanetary_disk.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/e8/Protoplanetary_disk.jpg/440px-Protoplanetary_disk.jpg 2x" data-file-width="800" data-file-height="534" /></a><figcaption>Imaxe artística d'un <a href="/w/index.php?title=Discu_protoplanetario&action=edit&redlink=1" class="new" title="Discu protoplanetario (la páxina nun esiste)">discu protoplanetario</a>, similar al que formó'l <a href="/wiki/Sistema_solar" class="mw-redirect" title="Sistema solar">sistema solar</a>. Créese que los oxetos de la nube d'Oort formar nel interior d'estos discos (bien lloñe de l'actual posición de la nube), cerca de los planetes xigantes como <a href="/wiki/X%C3%BApiter_(planeta)" title="Xúpiter (planeta)">Xúpiter</a> cuando inda taben formándose, y que la gravedá d'éstos espulsó al esterior los oxetos que güei formen la nube d'Oort.</figcaption></figure> <p>Tou indica que la nube d'Oort formóse como remanente del <a href="/w/index.php?title=Discu_protoplanetario&action=edit&redlink=1" class="new" title="Discu protoplanetario (la páxina nun esiste)">discu protoplanetario</a> que se <a href="/wiki/Formaci%C3%B3n_y_evoluci%C3%B3n_del_sistema_solar" title="Formación y evolución del sistema solar">formó alredor del Sol</a> fai 4600 millones d'años.<sup id="cite_ref-Morbidelli2005_1-7" class="reference"><a href="#cite_note-Morbidelli2005-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Neslusan2000_21-1" class="reference"><a href="#cite_note-Neslusan2000-21"><span class="cite-bracket">[</span>20<span class="cite-bracket">]</span></a></sup> La hipótesis más aceptada ye que los oxetos de la nube d'Oort formáronse mui cerca del Sol, nel mesmu procesu nel que se crearon los <a href="/wiki/Planeta" title="Planeta">planetes</a> y los <a href="/wiki/Asteroide" title="Asteroide">asteroides</a>, pero les interacciones gravitatories colos nuevos planetes gaseosos como Xúpiter y <a href="/wiki/Saturnu_(planeta)" title="Saturnu (planeta)">Saturnu</a> espulsaron estos oxetos escontra llargues <a href="/w/index.php?title=%C3%93rbita_el%C3%ADptica&action=edit&redlink=1" class="new" title="Órbita elíptica (la páxina nun esiste)">órbites elíptiques</a> o <a href="/w/index.php?title=Par%C3%A1bola_(matem%C3%A1tica)&action=edit&redlink=1" class="new" title="Parábola (matemática) (la páxina nun esiste)">parabóliques</a>.<sup id="cite_ref-Sol_24-0" class="reference"><a href="#cite_note-Sol-24"><span class="cite-bracket">[</span>23<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Levison1999_25-0" class="reference"><a href="#cite_note-Levison1999-25"><span class="cite-bracket">[</span>24<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Dones1998_26-0" class="reference"><a href="#cite_note-Dones1998-26"><span class="cite-bracket">[</span>25<span class="cite-bracket">]</span></a></sup> Realizáronse simulaciones de la evolución de la nube d'Oort dende la so formación hasta los nuesos díes y éstes amuesen que la so máxima masa adquirir 800 millones d'años tres la so formación.<sup id="cite_ref-Morbidelli2005_1-8" class="reference"><a href="#cite_note-Morbidelli2005-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p><p>Los modelos realizaos pol astrónomu <a href="/wiki/Urugu%C3%A1i" title="Uruguái">uruguayu</a> <a href="/w/index.php?title=Julio_%C3%81ngel_Fern%C3%A1ndez&action=edit&redlink=1" class="new" title="Julio Ángel Fernández (la páxina nun esiste)">Julio Ángel Fernández</a> suxeren que'l <a href="/w/index.php?title=Discu_esvalix%C3%A1u&action=edit&redlink=1" class="new" title="Discu esvalixáu (la páxina nun esiste)">discu esvalixáu</a>, que ye la principal fonte de cometes periódicos del sistema solar, podría ser tamién la principal fonte de los oxetos de la nube d'Oort. Acordies colos sos modelos, la metá de los oxetos tremaos viaxa escontra la nube d'Oort, un cuartu queda atrapáu orbitando a Xúpiter, y otru cuartu sale espulsáu n'órbites <a href="/w/index.php?title=Par%C3%A1bola_(matem%C3%A1tica)&action=edit&redlink=1" class="new" title="Parábola (matemática) (la páxina nun esiste)">parabóliques</a>. El discu esvalixáu inda podría siguir alimentando a la nube d'Oort, apurriéndo-y nuevu material.<sup id="cite_ref-Fernandez2004_27-0" class="reference"><a href="#cite_note-Fernandez2004-27"><span class="cite-bracket">[</span>26<span class="cite-bracket">]</span></a></sup> Calculóse que, al cabu de 2500 millones d'años, un terciu de los oxetos del discu esvalixáu van acabar na nube d'Oort.<sup id="cite_ref-Fernandez2003_28-0" class="reference"><a href="#cite_note-Fernandez2003-28"><span class="cite-bracket">[</span>27<span class="cite-bracket">]</span></a></sup>. </p><p><br /> Los modelos computacionales suxeren que los choques de los escombros de los cometes asocedíos mientres el periodu de formación desempeñen un rol muncho más importante de lo qu'enantes se creía. Acordies con estos modelos, mientres les fases más tempranes del sistema solar asocedieron tal cantidá de choques, que munches cometes fueron destruyíos antes d'algamar la nube d'Oort. Con éses la masa acumulao na actualidá na nube d'Oort ye enforma menor de lo que se pensaba.<sup id="cite_ref-Stern2001_29-0" class="reference"><a href="#cite_note-Stern2001-29"><span class="cite-bracket">[</span>28<span class="cite-bracket">]</span></a></sup> Calcúlase que la masa de la nube d'Oort ye solo una pequeña parte de les ente cincuenta y cien mases terrestres de material espulsáu.<sup id="cite_ref-Morbidelli2005_1-9" class="reference"><a href="#cite_note-Morbidelli2005-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p><p>La interacción gravitatoria d'otres estrelles y la <a href="/w/index.php?title=Marea_gal%C3%A1ctica&action=edit&redlink=1" class="new" title="Marea galáctica (la páxina nun esiste)">marea galáctica</a> modifica les órbites de los cometes, faciéndolos más circulares. Esto podría esplicar la forma esférica de la nube d'Oort esterior.<sup id="cite_ref-Morbidelli2005_1-10" class="reference"><a href="#cite_note-Morbidelli2005-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> Per otru llau, la nube interior, que s'atopa más amestada gravitacionalmente al Sol, inda nun adquirió dicha forma. Estudios recién amuesen que la formación de la nube d'Oort ye compatible cola hipótesis de que'l sistema solar formóse como parte d'un <a href="/wiki/C%C3%BAmulu_estelar" title="Cúmulu estelar">cúmulu</a> d'ente doscientes y cuatrocientes estrelles. Si la hipótesis ye correuta, les primeres estrelles del cúmulu que se formaron podríen afectar en gran midida a la formación de la nube d'Oort, dando llugar a frecuentes perturbaciones.<sup id="cite_ref-Brasser2006_30-0" class="reference"><a href="#cite_note-Brasser2006-30"><span class="cite-bracket">[</span>29<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Cometes">Cometes</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Nube_d%27Oort&veaction=edit&section=4" title="Editar seición: Cometes" class="mw-editsection-visualeditor"><span>editar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Nube_d%27Oort&action=edit&section=4" title="Editar el código fuente de la sección: Cometes"><span>editar la fonte</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Créese que los <a href="/wiki/Cometa" title="Cometa">cometes</a> aniciáronse en dos puntos bien estremaos del sistema solar. Los cometes de periodu curtiu xenerar na so mayor parte nel <a href="/wiki/Cintur%C3%B3n_de_Kuiper" title="Cinturón de Kuiper">Cinturón de Kuiper</a> o nel [ isu esvalixáu]], qu'empiecen a partir de la órbita de <a href="/wiki/Plut%C3%B3n_(planeta_nanu)" title="Plutón (planeta nanu)">Plutón</a> (a 38 <a href="/wiki/Unid%C3%A1_Astron%C3%B3mica" class="mw-redirect" title="Unidá Astronómica">ua</a> del Sol) y estiéndense hasta les 1El cinturón. Los de periodu llargu, como'l <a href="/wiki/Cometa_Hale-Bopp" title="Cometa Hale-Bopp">cometa Hale-Bopp</a>, que tarden miles d'años en completar una órbita, aniciáronse toos na nube d'Oort. El cinturón de Kuiper xenera pocos cometes por cuenta de la so órbita estable, al contrariu que'l discu esvalixáu, que ye dinámicamente bien activu.<sup id="cite_ref-ref_name=_31-0" class="reference"><a href="#cite_note-ref_name=-31"><span class="cite-bracket">[</span>30<span class="cite-bracket">]</span></a></sup> Los cometes escapen del discu esvalixáu y cayen so los dominios gravitatorios de los planetes esteriores, convirtiéndose no que se conoz como <a href="/wiki/Centauru_(astronom%C3%ADa)" title="Centauru (astronomía)">centauros</a>.<sup id="cite_ref-32" class="reference"><a href="#cite_note-32"><span class="cite-bracket">[</span>31<span class="cite-bracket">]</span></a></sup> Estos centauros, col tiempu, son unviaos más adientro del sistema solar y conviértense en cometes de periodu curtiu.<sup id="cite_ref-Horner2003_33-0" class="reference"><a href="#cite_note-Horner2003-33"><span class="cite-bracket">[</span>32<span class="cite-bracket">]</span></a></sup> </p> <figure class="mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/Ficheru:Lspn_comet_halley.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/2/2a/Lspn_comet_halley.jpg/250px-Lspn_comet_halley.jpg" decoding="async" width="250" height="174" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/2a/Lspn_comet_halley.jpg/375px-Lspn_comet_halley.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/2a/Lspn_comet_halley.jpg/500px-Lspn_comet_halley.jpg 2x" data-file-width="1492" data-file-height="1036" /></a><figcaption><a href="/wiki/Cometa_Halley" title="Cometa Halley">Cometa Halley</a>, ye'l prototipu de cometer tipu Halley (periodu curtiu), que se cree que s'aniciaron na nube d'Oort.</figcaption></figure> <p>Los cometes de periodu curtiu pueden estremase en dos tipos: los de la familia de <a href="/wiki/X%C3%BApiter_(planeta)" title="Xúpiter (planeta)">Xúpiter</a> y los de la familia del Halley (tamién llamaos cometes tipu Halley). La so principal diferencia anicia nel periodu; los primeres tarden menos de venti años en completalo y tienen <a href="/wiki/Semiexe_mayor" title="Semiexe mayor">semiexes mayores</a> en redol a 5 ua y los segundos tarden más de venti años y el so semiexe mayor suel ser de más de 10 ua. Tamién puede utilizase el <a href="/w/index.php?title=Par%C3%A1metru_de_Tisserand&action=edit&redlink=1" class="new" title="Parámetru de Tisserand (la páxina nun esiste)">parámetru de Tisserand</a> pa estremalos,<sup id="cite_ref-34" class="reference"><a href="#cite_note-34"><span class="cite-bracket">[</span>Nota 2<span class="cite-bracket">]</span></a></sup> siendo "<span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {T_{p}}=2}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mrow class="MJX-TeXAtom-ORD"> <msub> <mi>T</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>p</mi> </mrow> </msub> </mrow> <mo>=</mo> <mn>2</mn> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle {T_{p}}=2}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/ee78dbacc7e7c1b51c4671277fd723a398d5ce0b" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -1.005ex; width:6.678ex; height:2.843ex;" alt="{\displaystyle {T_{p}}=2}"></span>" la frontera de separación ente dambos, anque la so efeutividá ta apostada. Amás, los cometes de la familia de Xúpiter tienen enclinos orbitales baxes, unos 10° de media, ente que los de tipu Halley tienen enclinos orbitales bien desiguales, anque xeneralmente bien pronunciaes, d'unos 41° de media. Toes estes diferencies tienen llugar por cuenta del so orixe: los cometes de la familia de Xúpiter formar na so mayor parte nel discu esvalixáu, ente que los de la familia del Halley aniciar na nube d'Oort.<sup id="cite_ref-Cometes_35-0" class="reference"><a href="#cite_note-Cometes-35"><span class="cite-bracket">[</span>33<span class="cite-bracket">]</span></a></sup> Créese qu'estos postreros fueron cometes de periodu llargu que fueron prindaos pola gravedá de los planetes xigantes y unviaos al sistema solar interior.<sup id="cite_ref-Jewitt2002_8-1" class="reference"><a href="#cite_note-Jewitt2002-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> </p><p>Jan Oort decatar de que'l númberu de cometes yera menor que'l predichu pol so modelu ya inda na actualidá'l problema ta ensin resolver. Les hipótesis apunten a la destrucción de los cometes por impautu o a la so disgregación por <a href="/w/index.php?title=Fuercies_de_marea&action=edit&redlink=1" class="new" title="Fuercies de marea (la páxina nun esiste)">fuercies de marea</a>; tamién se suxer la perda de tolos compuestos volátiles o la formación d'una capa non volátil na so superficie, lo cual fadría invisible al cometa.<sup id="cite_ref-Dones2004_36-0" class="reference"><a href="#cite_note-Dones2004-36"><span class="cite-bracket">[</span>34<span class="cite-bracket">]</span></a></sup> Reparóse tamién que la incidencia de los cometes nos planetes esteriores ye enforma mayor que nos interiores. Lo más probable ye que se deba a l'atracción gravitatoria de Xúpiter, qu'actuaría a manera de barrera, atrapando los cometes y faciendo que topetaren con él, de la mesma qu'asocedió col <a href="/w/index.php?title=Cometa_Shoemaker-Levy_9&action=edit&redlink=1" class="new" title="Cometa Shoemaker-Levy 9 (la páxina nun esiste)">cometa Shoemaker-Levy 9</a> en <a href="/wiki/1994" title="1994">1994</a>.<sup id="cite_ref-Fernandez2000_37-0" class="reference"><a href="#cite_note-Fernandez2000-37"><span class="cite-bracket">[</span>35<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Fuercies_de_marea">Fuercies de marea</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Nube_d%27Oort&veaction=edit&section=5" title="Editar seición: Fuercies de marea" class="mw-editsection-visualeditor"><span>editar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Nube_d%27Oort&action=edit&section=5" title="Editar el código fuente de la sección: Fuercies de marea"><span>editar la fonte</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r4219085">.mw-parser-output .hatnote{font-style:italic}.mw-parser-output div.hatnote{padding-left:1.6em;margin-bottom:0.5em}.mw-parser-output .hatnote i{font-style:normal}.mw-parser-output .hatnote+link+.hatnote{margin-top:-0.5em}@media print{body.ns-0 .mw-parser-output .hatnote{display:none!important}}</style><div role="note" class="hatnote navigation-not-searchable">Ver tamién: <a href="/w/index.php?title=Marea_gal%C3%A1ctica&action=edit&redlink=1" class="new" title="Marea galáctica (la páxina nun esiste)">Marea galáctica</a></div> <figure class="mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/Ficheru:Fuerza_de_marea.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/6/6e/Fuerza_de_marea.svg/200px-Fuerza_de_marea.svg.png" decoding="async" width="200" height="253" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/6e/Fuerza_de_marea.svg/300px-Fuerza_de_marea.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/6e/Fuerza_de_marea.svg/400px-Fuerza_de_marea.svg.png 2x" data-file-width="225" data-file-height="285" /></a><figcaption>Al igual que la <a href="/wiki/Lluna" title="Lluna">Lluna</a> exerz <a href="/w/index.php?title=Marea_oce%C3%A1nica&action=edit&redlink=1" class="new" title="Marea oceánica (la páxina nun esiste)">marees sobre los océanos</a> de la <a href="/wiki/Tierra" title="Tierra">Tierra</a>, la nube d'Oort tamién sufre estes fuercies de marea; siguiendo'l símil, la Lluna sería la <a href="/wiki/V%C3%ADa_L%C3%A1ctea" class="mw-redirect" title="Vía Láctea">Vía Láctea</a> y los océanos los oxetos de la nube d'Oort.</figcaption></figure> <p>Les <a href="/w/index.php?title=Fuercia_de_marea&action=edit&redlink=1" class="new" title="Fuercia de marea (la páxina nun esiste)">fuercies de marea</a> prodúcense por cuenta de que la <a href="/wiki/Graved%C3%A1" title="Gravedá">gravedá</a> qu'exerz un cuerpu escai cola distancia. L'efeutu más cotidianu son les <a href="/w/index.php?title=Marea_oce%C3%A1nica&action=edit&redlink=1" class="new" title="Marea oceánica (la páxina nun esiste)">marees</a> que la <a href="/wiki/Lluna" title="Lluna">Lluna</a> provoca sobre los <a href="/wiki/Oc%C3%A9anu" title="Océanu">océanos</a> <a href="/wiki/Tierra" title="Tierra">terrestres</a>, causando qu'éstos xuban o baxen según la so cercanía al satélite.<sup id="cite_ref-Butikov2002_38-0" class="reference"><a href="#cite_note-Butikov2002-38"><span class="cite-bracket">[</span>36<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Kapoulitsas1985_39-0" class="reference"><a href="#cite_note-Kapoulitsas1985-39"><span class="cite-bracket">[</span>37<span class="cite-bracket">]</span></a></sup> De la mesma, la <a href="/wiki/V%C3%ADa_L%C3%A1ctea" class="mw-redirect" title="Vía Láctea">Vía Láctea</a> exerz estes fuercies de marea sobre la nube d'Oort, deformándola llixeramente escontra'l centru de la galaxa (polo que la nube d'Oort nun ye una esfera perfecta). Nel sistema solar interior esta marea galáutica ye ínfima, una y bones la gravedá solar predomina; pero cuanto mayor ye l'alloñanza al Sol aquélla vuélvese cada vez más perceptible. Esta pequeña fuercia ye abonda p'alteriar el movimientu de dellos miembros de la nube y una parte d'ellos son unviaos escontra'l Sol.<sup id="cite_ref-Breiter1996_40-0" class="reference"><a href="#cite_note-Breiter1996-40"><span class="cite-bracket">[</span>38<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Fouchard2006_41-0" class="reference"><a href="#cite_note-Fouchard2006-41"><span class="cite-bracket">[</span>39<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Matese1996_42-0" class="reference"><a href="#cite_note-Matese1996-42"><span class="cite-bracket">[</span>40<span class="cite-bracket">]</span></a></sup> </p><p>Dellos espertos creen que la marea galáutica pudo aumentar los <a href="/w/index.php?title=Perihelios&action=edit&redlink=1" class="new" title="Perihelios (la páxina nun esiste)">perihelios</a> (distancia más cercana al Sol) de dalgunos <a href="/w/index.php?title=Planetesimal&action=edit&redlink=1" class="new" title="Planetesimal (la páxina nun esiste)">planetesimales</a> con grandes <a href="/w/index.php?title=Afelios&action=edit&redlink=1" class="new" title="Afelios (la páxina nun esiste)">afelios</a>, contribuyendo asina a la formación de la nube d'Oort.<sup id="cite_ref-Higuchi2005_43-0" class="reference"><a href="#cite_note-Higuchi2005-43"><span class="cite-bracket">[</span>41<span class="cite-bracket">]</span></a></sup> Los efeutos de la marea galáutica son bien complexos y dependen en gran midida del comportamientu de cada unu de los oxetos del <a href="/wiki/Sistema_planetariu" title="Sistema planetariu">sistema planetariu</a>. Otra manera, a nivel global los efeutos son más qu'evidentes: créese que cerca d'un 90 % de los cometes qu'espulsa la nube d'Oort deber a ella.<sup id="cite_ref-Nurmi2001_44-0" class="reference"><a href="#cite_note-Nurmi2001-44"><span class="cite-bracket">[</span>42<span class="cite-bracket">]</span></a></sup> Los modelos estadísticos basaos nes órbites de los cometes de periodu llargu sofiten esta idea.<sup id="cite_ref-Matese2004_45-0" class="reference"><a href="#cite_note-Matese2004-45"><span class="cite-bracket">[</span>43<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Ciclos_d'estinción"><span id="Ciclos_d.27estinci.C3.B3n"></span>Ciclos d'estinción</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Nube_d%27Oort&veaction=edit&section=6" title="Editar seición: Ciclos d'estinción" class="mw-editsection-visualeditor"><span>editar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Nube_d%27Oort&action=edit&section=6" title="Editar el código fuente de la sección: Ciclos d'estinción"><span>editar la fonte</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Al estudiar les estinciones na <a href="/wiki/Tierra" title="Tierra">Tierra</a> los científicos alvirtieron un patrón que se repite cada ciertu tiempu. Repararon qu'aproximao cada 26 millones d'años nel nuesu planeta sume un porcentaxe d'especies considerable, anque inda nun se sabe con certidume qué la causa. </p><p>La <a href="/w/index.php?title=Marea_gal%C3%A1ctica&action=edit&redlink=1" class="new" title="Marea galáctica (la páxina nun esiste)">marea galáctica</a> podría esplicar estos ciclos d'estinciones. El Sol xira alredor del centru de la Vía Láctea y, na so órbita en redol a él, pasa pol <a href="/w/index.php?title=Planu_gal%C3%A1cticu&action=edit&redlink=1" class="new" title="Planu galácticu (la páxina nun esiste)">planu galácticu</a> con cierta regularidá. Cuando'l nuesu astru ta asitiáu fora del planu galácticu la fuercia de marea provocada pola galaxa ye más débil; de la mesma, cuando crucia'l planu galácticu la intensidá d'esta fuercia llega al so máximu, resultando nuna medría de la perturbación de la nube d'Oort y, por tanto, de la unviada de cometes escontra'l sistema solar interior hasta un factor de cuatro. Calcúlase que'l Sol pasa al traviés del planu galácticu n'intervalos d'ente venti y venticinco millones d'años.<sup id="cite_ref-Szpir_46-0" class="reference"><a href="#cite_note-Szpir-46"><span class="cite-bracket">[</span>44<span class="cite-bracket">]</span></a></sup> Sicasí, dellos astrónomos creen que'l pasu del Sol pol planu galácticu nun puede esplicar por sigo solo l'aumentu de la unviada de cometes, argumentando qu'anguaño'l Sol ta asitiáu mui cerca del planu galácticu y sicasí l'últimu eventu d'estinción asocedió hai apenes 15 millones d'años. En llugar d'ello proponen como causa'l pasu del Sol polos <a href="/wiki/Galaxa_espiral" title="Galaxa espiral">brazos espirales</a> de la galaxa, que, amás d'allugar a ensame de <a href="/wiki/Nube_molecular" title="Nube molecular">nubes moleculares</a> qu'alterien la nube d'Oort, tamién acueyen a numberoses <a href="/wiki/Xigante_azul" title="Xigante azul">xigantes azules</a>, que'l so tiempu de vida ye bien curtiu al consumir más rápido'l so combustible nuclear y en cuestión d'unos pocos millones d'años esploten violentamente aniciando <a href="/wiki/Supernova" title="Supernova">supernoves</a>.<sup id="cite_ref-Leitch1998_47-0" class="reference"><a href="#cite_note-Leitch1998-47"><span class="cite-bracket">[</span>45<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Perturbaciones_estelares">Perturbaciones estelares</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Nube_d%27Oort&veaction=edit&section=7" title="Editar seición: Perturbaciones estelares" class="mw-editsection-visualeditor"><span>editar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Nube_d%27Oort&action=edit&section=7" title="Editar el código fuente de la sección: Perturbaciones estelares"><span>editar la fonte</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Amás de la marea galáctica, esisten otros mecanismos capaces d'unviar cometes escontra'l sistema solar interior, como los <a href="/wiki/Graved%C3%A1" title="Gravedá">campos gravitatorios</a> de les estrelles cercanes o de les <a href="/wiki/Nube_molecular" title="Nube molecular">grandes nubes moleculares</a>.<sup id="cite_ref-Fernandez2000_37-1" class="reference"><a href="#cite_note-Fernandez2000-37"><span class="cite-bracket">[</span>35<span class="cite-bracket">]</span></a></sup> N'ocasiones, mientres la órbita que sigue'l Sol al traviés de la galaxa averar a otros sistemes estelares. Por casu, calculóse que mientres los próximos diez millones d'años la estrella conocida con mayores posibilidaes d'afectar a la nube d'Oort ye <a href="/wiki/Gliese_710" title="Gliese 710">Gliese 710</a> (ello ye que calcúlase que dientro d'unos 1,4 millones d'años va transitar pela nube d'Oort, aumentando hasta nun 50 % la tasa d'espulsión de cometes).<sup id="cite_ref-Sanchez1999_48-0" class="reference"><a href="#cite_note-Sanchez1999-48"><span class="cite-bracket">[</span>46<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Molnar1997_49-0" class="reference"><a href="#cite_note-Molnar1997-49"><span class="cite-bracket">[</span>47<span class="cite-bracket">]</span></a></sup> Esti procesu tamién esvalixa los oxetos fuera del planu eclíptico, esplicando la distribución esférica de la nube.<sup id="cite_ref-Higuchi2006_50-0" class="reference"><a href="#cite_note-Higuchi2006-50"><span class="cite-bracket">[</span>48<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Hipótesis_de_Némesis"><span id="Hip.C3.B3tesis_de_N.C3.A9mesis"></span>Hipótesis de Némesis</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Nube_d%27Oort&veaction=edit&section=8" title="Editar seición: Hipótesis de Némesis" class="mw-editsection-visualeditor"><span>editar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Nube_d%27Oort&action=edit&section=8" title="Editar el código fuente de la sección: Hipótesis de Némesis"><span>editar la fonte</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r4219085"><div role="note" class="hatnote navigation-not-searchable">Artículu principal: <a href="/w/index.php?title=Hip%C3%B3tesis_N%C3%A9mesis&action=edit&redlink=1" class="new" title="Hipótesis Némesis (la páxina nun esiste)">Hipótesis Némesis</a></div> <p>En <a href="/wiki/1984" title="1984">1984</a>, <a href="/w/index.php?title=Richard_A._Muller&action=edit&redlink=1" class="new" title="Richard A. Muller (la páxina nun esiste)">Richard A. Muller</a>, <a href="/w/index.php?title=Piet_Hut&action=edit&redlink=1" class="new" title="Piet Hut (la páxina nun esiste)">Piet Hut</a> y <a href="/w/index.php?title=Marc_Davis_(astrof%C3%ADsicu)&action=edit&redlink=1" class="new" title="Marc Davis (astrofísicu) (la páxina nun esiste)">Marc Davis</a> suxirieron la posibilidá de que'l <a href="/wiki/Sol" title="Sol">Sol</a> pudiera tener una compañera estelar que lo orbitara.<sup id="cite_ref-Davis1984_51-0" class="reference"><a href="#cite_note-Davis1984-51"><span class="cite-bracket">[</span>49<span class="cite-bracket">]</span></a></sup> Dichu oxetu hipotéticu recibió'l nome de <a href="/w/index.php?title=Hip%C3%B3tesis_N%C3%A9mesis&action=edit&redlink=1" class="new" title="Hipótesis Némesis (la páxina nun esiste)">Némesis</a>, que sería probablemente una <a href="/wiki/Nana_marr%C3%B3n" title="Nana marrón">nana marrón</a> y orbitaría mui cerca d'onde creemos que s'atopa la nube d'Oort. Némesis tendría una órbita elíptica, polo que cada 26 millones d'años pasaría al traviés de la nube, bombardiando cometes al sistema solar interior,<sup id="cite_ref-Hills1984_52-0" class="reference"><a href="#cite_note-Hills1984-52"><span class="cite-bracket">[</span>50<span class="cite-bracket">]</span></a></sup> lo qu'esplicaría la periodicidad de les estinciones na <a href="/wiki/Tierra" title="Tierra">Tierra</a>. Un añu más tarde, <a href="/w/index.php?title=D._Whitmire&action=edit&redlink=1" class="new" title="D. Whitmire (la páxina nun esiste)">D. Whitmire</a> y <a href="/w/index.php?title=J._J._Matese&action=edit&redlink=1" class="new" title="J. J. Matese (la páxina nun esiste)">J. J. Matese</a> suxirieron la posibilidá de que Némesis pudiera tratase d'un pequeñu <a href="/wiki/Furacu_negru" title="Furacu negru">furacu negru</a>; y nel <a href="/wiki/2002" title="2002">2002</a> esti postreru propunxo la esistencia d'un planeta xigante bien distante que sería'l causante de qu'una gran parte de los cometes que lleguen al sistema solar interior provengan d'una rexón concreta de la nube d'Oort.<sup id="cite_ref-Matese2002_53-0" class="reference"><a href="#cite_note-Matese2002-53"><span class="cite-bracket">[</span>51<span class="cite-bracket">]</span></a></sup> </p><p>Sicasí, nun s'atoparon pruebes definitives de la so esistencia y munchos científicos argumenten qu'una compañera estelar a una distancia tan enorme del Sol nun podría tener una órbita estable, yá que sería espulsada poles perturbaciones de les demás estrelles. </p> <div class="mw-heading mw-heading2"><h2 id="Oxetos_de_la_nube_d'Oort"><span id="Oxetos_de_la_nube_d.27Oort"></span>Oxetos de la nube d'Oort</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Nube_d%27Oort&veaction=edit&section=9" title="Editar seición: Oxetos de la nube d'Oort" class="mw-editsection-visualeditor"><span>editar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Nube_d%27Oort&action=edit&section=9" title="Editar el código fuente de la sección: Oxetos de la nube d'Oort"><span>editar la fonte</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/Ficheru:Planetoid_90377_sedna_animation_location.gif" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/2/21/Planetoid_90377_sedna_animation_location.gif" decoding="async" width="320" height="240" class="mw-file-element" data-file-width="320" data-file-height="240" /></a><figcaption>Animación qu'amuesa la órbita de <a href="/w/index.php?title=90377_Sedna&action=edit&redlink=1" class="new" title="90377 Sedna (la páxina nun esiste)">Sedna</a>, afayáu en 2004, un posible oxetu de la nube d'Oort interior.</figcaption></figure> <p>Dexando a un llau los cometes de periodu llargu, solo conócense cuatro objetos que se cree que pertenecen a la nube d'Oort; tratar de <a href="/w/index.php?title=90377_Sedna&action=edit&redlink=1" class="new" title="90377 Sedna (la páxina nun esiste)">90377 Sedna</a>, <a href="/w/index.php?title=(148209)_2000_CR105&action=edit&redlink=1" class="new" title="(148209) 2000 CR105 (la páxina nun esiste)"><span style="white-space:nowrap">(148209) 2000 CR<sub>105</sub></span></a>, <a href="/w/index.php?title=(308933)_2006_SQ372&action=edit&redlink=1" class="new" title="(308933) 2006 SQ372 (la páxina nun esiste)"><span style="white-space:nowrap">(308933) 2006 SQ<sub>372</sub></span></a>, <a href="/w/index.php?title=2008_KV42&action=edit&redlink=1" class="new" title="2008 KV42 (la páxina nun esiste)"><span style="white-space:nowrap">2008 KV<sub>42</sub></span></a>. Por causa de la so alloñanza, el <a href="/wiki/Periheliu" title="Periheliu">periheliu</a> de los dos primeros, a diferencia de los oxetos del discu esvalixáu, nun llega a trate afeutáu pola gravedá de <a href="/wiki/Neptunu_(planeta)" title="Neptunu (planeta)">Neptunu</a>, polo que les sos órbites nun pueden esplicase poles <a href="/w/index.php?title=Perturbaci%C3%B3n_(astronom%C3%ADa)&action=edit&redlink=1" class="new" title="Perturbación (astronomía) (la páxina nun esiste)">perturbaciones</a> de los planetes xigantes.<sup id="cite_ref-Brown2004_54-0" class="reference"><a href="#cite_note-Brown2004-54"><span class="cite-bracket">[</span>52<span class="cite-bracket">]</span></a></sup> Si formárense nes sos actuales posiciones, les sos órbites tendríen de ser circulares; amás, l'<a href="/w/index.php?title=Acreci%C3%B3n&action=edit&redlink=1" class="new" title="Acreción (la páxina nun esiste)">acreción</a> queda refugada, pos la enorme velocidá cola que se movíen los <a href="/w/index.php?title=Planetesimal&action=edit&redlink=1" class="new" title="Planetesimal (la páxina nun esiste)">planetesimales</a> resultaría demasiáu perxudicial.<sup id="cite_ref-Sheppard2005_55-0" class="reference"><a href="#cite_note-Sheppard2005-55"><span class="cite-bracket">[</span>53<span class="cite-bracket">]</span></a></sup> </p><p>Hai delles hipótesis qu'esplicaríen les sos escéntriques órbites: podríen ser afeutaos pola gravedá d'una estrella cercana cuando'l Sol inda s'atopaba dientro del cúmulu estelar que dio llugar a la so formación. En casu de qu'asina fora,<sup id="cite_ref-Morbidelli2004_3-1" class="reference"><a href="#cite_note-Morbidelli2004-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> podríen tamién ser alteriaos por un cuerpu inda desconocíu del tamañu d'un planeta que s'atopara dientro de la nube d'Oort,<sup id="cite_ref-Gomes2006_56-0" class="reference"><a href="#cite_note-Gomes2006-56"><span class="cite-bracket">[</span>54<span class="cite-bracket">]</span></a></sup> podría debese tamién a una dispersión exercida por <a href="/wiki/Neptunu_(planeta)" title="Neptunu (planeta)">Neptunu</a> mientres un periodu de gran <a href="/wiki/Escentricid%C3%A1_(matem%C3%A1tica)" title="Escentricidá (matemática)">escentricidá</a> o pola gravedá d'un alloñáu discu tresneptunianu primitivu, o inclusive ser prindaes por pequeñu estrelles que pasaben esporádicamente cerca del Sol. De toes elles, la perturbación d'otres estrelles paez ser hasta agora lo más plausible.<sup id="cite_ref-Morbidelli2004_3-2" class="reference"><a href="#cite_note-Morbidelli2004-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> Dellos astrónomos prefieren incluyir tanto a Sedna como a <span style="white-space:nowrap">2000 CR<sub>105</sub></span> no que denominen "discu esvalixáu estendíu", en llugar d'en la nube d'Oort interna.<sup id="cite_ref-Sheppard2005_55-1" class="reference"><a href="#cite_note-Sheppard2005-55"><span class="cite-bracket">[</span>53<span class="cite-bracket">]</span></a></sup> </p> <center> <table class="wikitable"> <caption><b>Posibles Oxetos de la nube d'Oort</b> </caption> <tbody><tr> <th colspan="1">Númberu </th> <th colspan="1">Nome </th> <th colspan="1">Diámetru ecuatorial <p>(km) </p> </th> <th colspan="1"><a href="/wiki/Periheliu" title="Periheliu">Periheliu</a> (<a href="/wiki/Unid%C3%A1_Astron%C3%B3mica" class="mw-redirect" title="Unidá Astronómica">ua</a>) </th> <th colspan="1"><a href="/w/index.php?title=Afelio&action=edit&redlink=1" class="new" title="Afelio (la páxina nun esiste)">Afelio</a> (ua) </th> <th colspan="1">Añu de descubrimientu </th> <th colspan="1">Descubridor </th></tr> <tr> <td align="center">90377 </td> <td align="center"><a href="/w/index.php?title=(90377)_Sedna&action=edit&redlink=1" class="new" title="(90377) Sedna (la páxina nun esiste)">Sedna</a> </td> <td align="center">1.180-1.800 </td> <td align="center">76,1 </td> <td align="center">892 </td> <td align="center">2003 </td> <td align="center"><a href="/w/index.php?title=Michael_E._Brown&action=edit&redlink=1" class="new" title="Michael E. Brown (la páxina nun esiste)">Brown</a>, <a href="/w/index.php?title=Chad_Trujillo&action=edit&redlink=1" class="new" title="Chad Trujillo (la páxina nun esiste)">Trujillo</a>, <a href="/w/index.php?title=David_Lincoln_Rabinowitz&action=edit&redlink=1" class="new" title="David Lincoln Rabinowitz (la páxina nun esiste)">Rabinowitz</a> </td></tr> <tr> <td align="center">148209 </td> <td align="center"><a href="/w/index.php?title=(148209)_2000_CR105&action=edit&redlink=1" class="new" title="(148209) 2000 CR105 (la páxina nun esiste)"><span style="white-space:nowrap">(148209) 2000 CR<sub>105</sub></span></a> </td> <td align="center">~250 </td> <td align="center">44,3 </td> <td align="center">397 </td> <td align="center">2000 </td> <td align="center"><a href="/w/index.php?title=Observatoriu_Lowell&action=edit&redlink=1" class="new" title="Observatoriu Lowell (la páxina nun esiste)">Observatoriu Lowell</a> </td></tr> <tr> <td align="center">308933 </td> <td align="center"><a href="/w/index.php?title=(308933)_2006_SQ372&action=edit&redlink=1" class="new" title="(308933) 2006 SQ372 (la páxina nun esiste)"><span style="white-space:nowrap">(308933) 2006 SQ<sub>372</sub></span></a> </td> <td align="center">50-100 </td> <td align="center">24,17 </td> <td align="center">2005,38 </td> <td align="center">2006 </td> <td align="center"><a href="/w/index.php?title=Andrew_Becker&action=edit&redlink=1" class="new" title="Andrew Becker (la páxina nun esiste)">A. C. Becker</a> </td></tr> <tr> <td align="center">- </td> <td align="center"><a href="/w/index.php?title=2008_KV42&action=edit&redlink=1" class="new" title="2008 KV42 (la páxina nun esiste)"><span style="white-space:nowrap">2008 KV<sub>42</sub></span></a> </td> <td align="center">58,9 </td> <td align="center">20 217 </td> <td align="center">71 760 </td> <td align="center">2008 </td> <td align="center"><a href="/w/index.php?title=Canada-France-Hawaii_Telescope&action=edit&redlink=1" class="new" title="Canada-France-Hawaii Telescope (la páxina nun esiste)">Canada-France-Hawaii Telescope</a> </td></tr></tbody></table> </center> <div class="mw-heading mw-heading2"><h2 id="Ver_tamién"><span id="Ver_tami.C3.A9n"></span>Ver tamién</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Nube_d%27Oort&veaction=edit&section=10" title="Editar seición: Ver tamién" class="mw-editsection-visualeditor"><span>editar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Nube_d%27Oort&action=edit&section=10" title="Editar el código fuente de la sección: Ver tamién"><span>editar la fonte</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Cometa" title="Cometa">Cometa</a></li> <li><a href="/wiki/Cometa_Halley" title="Cometa Halley">Cometa Halley</a></li> <li><a href="/wiki/Cintur%C3%B3n_de_Kuiper" title="Cinturón de Kuiper">Cinturón de Kuiper</a></li> <li><a href="/wiki/Cintur%C3%B3n_d%27asteroides" title="Cinturón d'asteroides">Cinturón d'asteroides</a></li> <li><a href="/w/index.php?title=Nube_de_Hills&action=edit&redlink=1" class="new" title="Nube de Hills (la páxina nun esiste)">Nube de Hills</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Notes">Notes</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Nube_d%27Oort&veaction=edit&section=11" title="Editar seición: Notes" class="mw-editsection-visualeditor"><span>editar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Nube_d%27Oort&action=edit&section=11" title="Editar el código fuente de la sección: Notes"><span>editar la fonte</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r3503771">@media only screen and (max-width:600px){.mw-parser-output .llistaref{column-count:1!important}}</style><div class="llistaref" style="list-style-type: decimal;"><ol class="references"> <li id="cite_note-14"><span class="mw-cite-backlink"><a href="#cite_ref-14">↑</a></span> <span class="reference-text">La <a href="/wiki/Magnit%C3%BA_absoluta" title="Magnitú absoluta">magnitú absoluta</a> ye la midida del rellumu d'un oxetu celeste si atopar a 10 <a href="/wiki/P%C3%A1rsec" title="Pársec">pcs</a> (Pársecs); otra manera, la <a href="/wiki/Magnit%C3%BA_aparente" title="Magnitú aparente">magnitú aparente</a> mide'l rellumu que se repara dende la Tierra. Como la magnitú absoluta parte de que tolos cuerpos atopar a la mesma distancia, tratar d'una midida del rellumu real d'un oxetu. Cuanto más brillosu sía un oxetu, menor va ser el valor de la so magnitú absoluta.</span> </li> <li id="cite_note-34"><span class="mw-cite-backlink"><a href="#cite_ref-34">↑</a></span> <span class="reference-text">El parámetru Tisserand vien dau por:<br /> <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle T_{p}={\frac {a_{p}}{a}}+2\cdot \cos(i)\cdot {\sqrt {{\frac {a}{a_{p}}}\cdot (1-y^{2})}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msub> <mi>T</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>p</mi> </mrow> </msub> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <msub> <mi>a</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>p</mi> </mrow> </msub> <mi>a</mi> </mfrac> </mrow> <mo>+</mo> <mn>2</mn> <mo>⋅<!-- ⋅ --></mo> <mi>cos</mi> <mo>⁡<!-- --></mo> <mo stretchy="false">(</mo> <mi>i</mi> <mo stretchy="false">)</mo> <mo>⋅<!-- ⋅ --></mo> <mrow class="MJX-TeXAtom-ORD"> <msqrt> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mi>a</mi> <msub> <mi>a</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>p</mi> </mrow> </msub> </mfrac> </mrow> <mo>⋅<!-- ⋅ --></mo> <mo stretchy="false">(</mo> <mn>1</mn> <mo>−<!-- − --></mo> <msup> <mi>y</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> </msup> <mo stretchy="false">)</mo> </msqrt> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle T_{p}={\frac {a_{p}}{a}}+2\cdot \cos(i)\cdot {\sqrt {{\frac {a}{a_{p}}}\cdot (1-y^{2})}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/96fc10880493450e775d65bb30da7f4e8e14695d" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -3.005ex; width:36.879ex; height:6.343ex;" alt="{\displaystyle T_{p}={\frac {a_{p}}{a}}+2\cdot \cos(i)\cdot {\sqrt {{\frac {a}{a_{p}}}\cdot (1-y^{2})}}}"></span> <br />Onde: <dl><dd>"<span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle a_{p}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msub> <mi>a</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>p</mi> </mrow> </msub> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle a_{p}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/d3a5f11f304b2976ca9d33d1575c148e791728e7" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -1.005ex; width:2.289ex; height:2.343ex;" alt="{\displaystyle a_{p}}"></span>" ye'l <a href="/wiki/Semiexe_mayor" title="Semiexe mayor">semiexe mayor</a> del planeta.</dd> <dd>"a" ye'l semiexe mayor del cometa.</dd> <dd>"i" ye l'enclín orbital del cometa.</dd> <dd>"y" ye la <a href="/wiki/Escentricid%C3%A1_(ciencies_exactes)" class="mw-redirect" title="Escentricidá (ciencies exactes)">escentricidá</a> del cometa.</dd></dl> </span></li> </ol></div> <div class="mw-heading mw-heading2"><h2 id="Referencies">Referencies</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Nube_d%27Oort&veaction=edit&section=12" title="Editar seición: Referencies" class="mw-editsection-visualeditor"><span>editar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Nube_d%27Oort&action=edit&section=12" title="Editar el código fuente de la sección: Referencies"><span>editar la fonte</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r3503771"><div class="llistaref" style="-moz-column-count:2; -webkit-column-count:2; column-count:2; list-style-type: decimal;"><ol class="references"> <li id="cite_note-Morbidelli2005-1"><span class="mw-cite-backlink">↑ <sup><a href="#cite_ref-Morbidelli2005_1-0">1,00</a></sup> <sup><a href="#cite_ref-Morbidelli2005_1-1">1,01</a></sup> <sup><a href="#cite_ref-Morbidelli2005_1-2">1,02</a></sup> <sup><a href="#cite_ref-Morbidelli2005_1-3">1,03</a></sup> <sup><a href="#cite_ref-Morbidelli2005_1-4">1,04</a></sup> <sup><a href="#cite_ref-Morbidelli2005_1-5">1,05</a></sup> <sup><a href="#cite_ref-Morbidelli2005_1-6">1,06</a></sup> <sup><a href="#cite_ref-Morbidelli2005_1-7">1,07</a></sup> <sup><a href="#cite_ref-Morbidelli2005_1-8">1,08</a></sup> <sup><a href="#cite_ref-Morbidelli2005_1-9">1,09</a></sup> <sup><a href="#cite_ref-Morbidelli2005_1-10">1,10</a></sup></span> <span class="reference-text">Morbidelli, Alessandro (2005). «<a rel="nofollow" class="external text" href="http://arxiv.org/abs/astru-ph/0512256v1">Origin and Dynamical Evolution of Comets and their Reservoirs</a>». Consultáu'l 2 de setiembre de 2008.</span> </li> <li id="cite_note-Emelyanenko2007-2"><span class="mw-cite-backlink">↑ <sup><a href="#cite_ref-Emelyanenko2007_2-0">2,0</a></sup> <sup><a href="#cite_ref-Emelyanenko2007_2-1">2,1</a></sup> <sup><a href="#cite_ref-Emelyanenko2007_2-2">2,2</a></sup></span> <span class="reference-text"><span class="citation cita-Journal" id="CITAREFEmel'yanenko,_V.V.;_Asher,_D.J._y_Bailey,_M.Y.2007">Emel'yanenko, V.V.; Asher, D.J. y Bailey, M.Y. (2007). «<a rel="nofollow" class="external text" href="https://dx.doi.org/10.1111/j.1365-2966.2007.12269.x">The fundamental role of the Oort cloud in determining the flux of comets through the planetary system</a>». <i>Monthly Notices of the Royal Astronomical Society</i> <b>381</b> (2). <small>p. 779-789</small><span class="printonly">. <a rel="nofollow" class="external free" href="https://dx.doi.org/10.1111/j.1365-2966.2007.12269.x">http://dx.doi.org/10.1111/j.1365-2966.2007.12269.x</a></span>.</span><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.atitle=The+fundamental+role+of+the+Oort+cloud+in+determining+the+flux+of+comets+through+the+planetary+system&rft.jtitle=Monthly+Notices+of+the+Royal+Astronomical+Society&rft.aulast=Emel%27yanenko%2C+V.V.%3B+Asher%2C+D.J.+y+Bailey%2C+M.Y.&rft.au=Emel%27yanenko%2C+V.V.%3B+Asher%2C+D.J.+y+Bailey%2C+M.Y.&rft.date=2007&rft.volume=381&rft.issue=2&rft_id=http%3A%2F%2Fdx.doi.org%2F10.1111%2Fj.1365-2966.2007.12269.x&rfr_id=info:sid/ast.wikipedia.org:Nube_d%27Oort"><span style="display: none;"> </span></span></span> </li> <li id="cite_note-Morbidelli2004-3"><span class="mw-cite-backlink">↑ <sup><a href="#cite_ref-Morbidelli2004_3-0">3,0</a></sup> <sup><a href="#cite_ref-Morbidelli2004_3-1">3,1</a></sup> <sup><a href="#cite_ref-Morbidelli2004_3-2">3,2</a></sup></span> <span class="reference-text"><span class="citation cita-Journal" id="CITAREFMorbidelli,_A._y_Levison_H._F.2004">Morbidelli, A. y Levison H. F. (2004). «<a rel="nofollow" class="external text" href="https://dx.doi.org/10.1086/424617">Scenarios for the Origin of the Orbits of the Trans-Neptunian Objects 2000 CR<sub>105</sub> and 2003 VB<sub>12</sub> (Sedna)</a>». <i>The Astronomical Journal</i> <b>128</b> (5). <small>p. 2564-2576</small><span class="printonly">. <a rel="nofollow" class="external free" href="https://dx.doi.org/10.1086/424617">http://dx.doi.org/10.1086/424617</a></span>.</span><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.atitle=Scenarios+for+the+Origin+of+the+Orbits+of+the+Trans-Neptunian+Objects+2000+CR%3Csub%3E105%3C%2Fsub%3E+and+2003+VB%3Csub%3E12%3C%2Fsub%3E+%28Sedna%29&rft.jtitle=The+Astronomical+Journal&rft.aulast=Morbidelli%2C+A.+y+Levison+H.+F.&rft.au=Morbidelli%2C+A.+y+Levison+H.+F.&rft.date=2004&rft.volume=128&rft.issue=5&rft_id=http%3A%2F%2Fdx.doi.org%2F10.1086%2F424617&rfr_id=info:sid/ast.wikipedia.org:Nube_d%27Oort"><span style="display: none;"> </span></span></span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><a href="#cite_ref-4">↑</a></span> <span class="reference-text">Europa Press (26 de marzu de 2014). «<a rel="nofollow" class="external text" href="https://www.europapress.es/ciencia/noticia-afayen-nuevu-planeta-nanu-sistema-solar-20140326191204.html">Un nuevu planeta nanu camuda'l mapa del Sistema Solar</a>». Consultáu'l 27 de marzu de 2013.</span> </li> <li id="cite_note-5"><span class="mw-cite-backlink"><a href="#cite_ref-5">↑</a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://www.nature.com/news/astronomers-spy-most-distant-solar-system-object-ever-1.18770">un artículu</a></span> </li> <li id="cite_note-Opik1932-6"><span class="mw-cite-backlink"><a href="#cite_ref-Opik1932_6-0">↑</a></span> <span class="reference-text"><span class="citation cita-Journal" id="CITAREFErnst_Julius_Öpik1932">Ernst Julius Öpik (1932). «Note on Stellar Perturbations of Nearby Parabolic Orbits». <i>Proceedings of the American Academy of Arts and Sciences</i> <b>67</b>. <small>p. 169-182</small>.</span><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.atitle=Note+on+Stellar+Perturbations+of+Nearby+Parabolic+Orbits&rft.jtitle=Proceedings+of+the+American+Academy+of+Arts+and+Sciences&rft.aulast=Ernst+Julius+%C3%96pik&rft.au=Ernst+Julius+%C3%96pik&rft.date=1932&rft.volume=67&rfr_id=info:sid/ast.wikipedia.org:Nube_d%27Oort"><span style="display: none;"> </span></span></span> </li> <li id="cite_note-Oort1950-7"><span class="mw-cite-backlink">↑ <sup><a href="#cite_ref-Oort1950_7-0">7,0</a></sup> <sup><a href="#cite_ref-Oort1950_7-1">7,1</a></sup></span> <span class="reference-text"><span class="citation cita-Journal" id="CITAREFOort,_J._H.1950">Oort, J. H. (1950). «<a rel="nofollow" class="external text" href="http://adsabs.harvard.edu/abs/1950BAN....11...91O">The structure of the cloud of comets surrounding the Solar System and a hypothesis concerning its origin</a>». <i>Bull. Astron. Inst. Neth.</i> <b>11</b>. <small>p. 91-110</small><span class="printonly">. <a rel="nofollow" class="external free" href="http://adsabs.harvard.edu/abs/1950BAN....11...91O">http://adsabs.harvard.edu/abs/1950BAN....11...91O</a></span>.</span><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.atitle=The+structure+of+the+cloud+of+comets+surrounding+the+Solar+System+and+a+hypothesis+concerning+its+origin&rft.jtitle=Bull.+Astron.+Inst.+Neth.&rft.aulast=Oort%2C+J.+H.&rft.au=Oort%2C+J.+H.&rft.date=1950&rft.volume=11&rft_id=http%3A%2F%2Fadsabs.harvard.edu%2Fabs%2F1950BAN....11...91O&rfr_id=info:sid/ast.wikipedia.org:Nube_d%27Oort"><span style="display: none;"> </span></span></span> </li> <li id="cite_note-Jewitt2002-8"><span class="mw-cite-backlink">↑ <sup><a href="#cite_ref-Jewitt2002_8-0">8,0</a></sup> <sup><a href="#cite_ref-Jewitt2002_8-1">8,1</a></sup></span> <span class="reference-text"><span class="citation cita-Journal" id="CITAREFJewitt,_David_C.2002">Jewitt, David C. (2002). «<a rel="nofollow" class="external text" href="https://dx.doi.org/10.1086/338692">From Kuiper Belt Object to Cometary Nucleus: The Missing Ultrared Matter</a>». <i>The Astronomical Journal</i> <b>123</b> (2). <small>p. 1039-1049</small><span class="printonly">. <a rel="nofollow" class="external free" href="https://dx.doi.org/10.1086/338692">http://dx.doi.org/10.1086/338692</a></span>.</span><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.atitle=From+Kuiper+Belt+Object+to+Cometary+Nucleus%3A+The+Missing+Ultrared+Matter&rft.jtitle=The+Astronomical+Journal&rft.aulast=Jewitt%2C+David+C.&rft.au=Jewitt%2C+David+C.&rft.date=2002&rft.volume=123&rft.issue=2&rft_id=http%3A%2F%2Fdx.doi.org%2F10.1086%2F338692&rfr_id=info:sid/ast.wikipedia.org:Nube_d%27Oort"><span style="display: none;"> </span></span></span> </li> <li id="cite_note-Enciclopedia-9"><span class="mw-cite-backlink">↑ <sup><a href="#cite_ref-Enciclopedia_9-0">9,0</a></sup> <sup><a href="#cite_ref-Enciclopedia_9-1">9,1</a></sup> <sup><a href="#cite_ref-Enciclopedia_9-2">9,2</a></sup> <sup><a href="#cite_ref-Enciclopedia_9-3">9,3</a></sup></span> <span class="reference-text"><cite style="font-style:normal">Harold F. Levison, Luke Donnes (2007). «Comet Populations and Cometary Dynamics», <i>Encyclopedia of the Solar System, Second Edition</i>. Academic Press.</cite></span> </li> <li id="cite_note-Hills1981-10"><span class="mw-cite-backlink">↑ <sup><a href="#cite_ref-Hills1981_10-0">10,0</a></sup> <sup><a href="#cite_ref-Hills1981_10-1">10,1</a></sup></span> <span class="reference-text"><span class="citation cita-Journal" id="CITAREFHills,_J._G.1981">Hills, J. G. (1981). «<a rel="nofollow" class="external text" href="https://dx.doi.org/10.1086/113058">Comet showers and the steady-state infall of comets from the Oort cloud</a>». <i>Astronomical Journal</i> <b>86</b> (Nov. 1981). <small>p. 1730-1740</small><span class="printonly">. <a rel="nofollow" class="external free" href="https://dx.doi.org/10.1086/113058">http://dx.doi.org/10.1086/113058</a></span>.</span><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.atitle=Comet+showers+and+the+steady-state+infall+of+comets+from+the+Oort+cloud&rft.jtitle=Astronomical+Journal&rft.aulast=Hills%2C+J.+G.&rft.au=Hills%2C+J.+G.&rft.date=1981&rft.volume=86&rft.issue=Nov.+1981&rft_id=http%3A%2F%2Fdx.doi.org%2F10.1086%2F113058&rfr_id=info:sid/ast.wikipedia.org:Nube_d%27Oort"><span style="display: none;"> </span></span></span> </li> <li id="cite_note-Levison2001-11"><span class="mw-cite-backlink"><a href="#cite_ref-Levison2001_11-0">↑</a></span> <span class="reference-text"><span class="citation cita-Journal" id="CITAREFLevison,_H._F.;_Dones,_L._y_Duncan_M._J.2001">Levison, H. F.; Dones, L. y Duncan M. J. (2001). «<a rel="nofollow" class="external text" href="https://dx.doi.org/10.1086/319943">The Origin of Halley-Type Comets: Probing the Inner Oort Cloud</a>». <i>The Astronomical Journal</i> <b>121</b> (4). <small>p. 2253-2267</small><span class="printonly">. <a rel="nofollow" class="external free" href="https://dx.doi.org/10.1086/319943">http://dx.doi.org/10.1086/319943</a></span>.</span><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.atitle=The+Origin+of+Halley-Type+Comets%3A+Probing+the+Inner+Oort+Cloud&rft.jtitle=The+Astronomical+Journal&rft.aulast=Levison%2C+H.+F.%3B+Dones%2C+L.+y+Duncan+M.+J.&rft.au=Levison%2C+H.+F.%3B+Dones%2C+L.+y+Duncan+M.+J.&rft.date=2001&rft.volume=121&rft.issue=4&rft_id=http%3A%2F%2Fdx.doi.org%2F10.1086%2F319943&rfr_id=info:sid/ast.wikipedia.org:Nube_d%27Oort"><span style="display: none;"> </span></span></span> </li> <li id="cite_note-NAS1991-12"><span class="mw-cite-backlink"><a href="#cite_ref-NAS1991_12-0">↑</a></span> <span class="reference-text"><cite style="font-style:normal" id="Referencia-Slotten-1991">Slotten, National Academy of Sciences (1991). <i>Planetary Sciences: American and Soviet Research/Proceedings from the U.S.-U.S.S.R. Workshop on Planetary Sciences</i>. National Academies Press, páx. 304 páxs.. <a href="/wiki/Especial:FuentesDeLibros/0309043336" title="Especial:FuentesDeLibros/0309043336">ISBN 0309043336</a>.</cite></span> </li> <li id="cite_note-Fernandez2002-13"><span class="mw-cite-backlink"><a href="#cite_ref-Fernandez2002_13-0">↑</a></span> <span class="reference-text"><span class="citation cita-Journal" id="CITAREFFernández,_Julio_A.2002">Fernández, Julio A. (2002). «<a rel="nofollow" class="external text" href="https://dx.doi.org/10.1006/icar.1997.5754">The Formation of the Oort Cloud and the Primitive Galactic Environment</a>». <i>Icarus</i> <b>129</b> (1). <small>p. 106-119</small><span class="printonly">. <a rel="nofollow" class="external free" href="https://dx.doi.org/10.1006/icar.1997.5754">http://dx.doi.org/10.1006/icar.1997.5754</a></span>.</span><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.atitle=The+Formation+of+the+Oort+Cloud+and+the+Primitive+Galactic+Environment&rft.jtitle=Icarus&rft.aulast=Fern%C3%A1ndez%2C+Julio+A.&rft.au=Fern%C3%A1ndez%2C+Julio+A.&rft.date=2002&rft.volume=129&rft.issue=1&rft_id=http%3A%2F%2Fdx.doi.org%2F10.1006%2Ficar.1997.5754&rfr_id=info:sid/ast.wikipedia.org:Nube_d%27Oort"><span style="display: none;"> </span></span></span> </li> <li id="cite_note-SciAmerican-15"><span class="mw-cite-backlink"><a href="#cite_ref-SciAmerican_15-0">↑</a></span> <span class="reference-text">Paul R. Weissman (1998). «<a rel="nofollow" class="external text" href="http://www.sciamdigital.com/index.cfm?fa=Products.ViewIssuePreview&ISSUEID_CHAR=8DB2FB44-6B4B-47AF-B46B-791A911764D&ARTICLEID_CHAR=B294C211-98B8-4374-92AB-158C4866AB1">The Oort Cloud</a>» <span style="color:var(--color-subtle, #54595d);"><span style="color:var(--color-subtle, #54595d)">(inglés)</span></span>. <i>Scientific American</i>.  Scientific American, Inc.. Consultáu'l 1 de setiembre de 2008.</span> </li> <li id="cite_note-Weissman1983-16"><span class="mw-cite-backlink"><a href="#cite_ref-Weissman1983_16-0">↑</a></span> <span class="reference-text"><span class="citation cita-Journal" id="CITAREFWeissman,_P._R.1983">Weissman, P. R. (1983). «<a rel="nofollow" class="external text" href="http://adsabs.harvard.edu/abs/1983A&A...118...90W">The mass of the Oort cloud</a>». <i>Astronomy and Astrophysics</i> <b>118</b> (1). <small>p. 90-94</small><span class="printonly">. <a rel="nofollow" class="external free" href="http://adsabs.harvard.edu/abs/1983A&A...118...90W">http://adsabs.harvard.edu/abs/1983A&A...118...90W</a></span>.</span><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.atitle=The+mass+of+the+Oort+cloud&rft.jtitle=Astronomy+and+Astrophysics&rft.aulast=Weissman%2C+P.+R.&rft.au=Weissman%2C+P.+R.&rft.date=1983&rft.volume=118&rft.issue=1&rft_id=http%3A%2F%2Fadsabs.harvard.edu%2Fabs%2F1983A%26A...118...90W&rfr_id=info:sid/ast.wikipedia.org:Nube_d%27Oort"><span style="display: none;"> </span></span></span> </li> <li id="cite_note-Buhai-17"><span class="mw-cite-backlink"><a href="#cite_ref-Buhai_17-0">↑</a></span> <span class="reference-text">Buhai, Sebastian. «<a rel="nofollow" class="external text" href="https://web.archive.org/web/http://www.tinbergen.nl/~buhai/pictures/UCU/Physics_AppliedMathematics/Astrophysics/long_period_comets.pdf">On the Origin of the Long Period Comets: Competing theories</a>» <span style="color:var(--color-subtle, #54595d);"><span style="color:var(--color-subtle, #54595d)">(inglés)</span></span>.  Utrecht University College. Archiváu dende l'<a rel="nofollow" class="external text" href="http://www.tinbergen.nl/~buhai/pictures/UCU/Physics_AppliedMathematics/Astrophysics/long_period_comets.pdf">orixinal</a>, el 26 de payares de 2015. Consultáu'l 1 de setiembre de 2008.</span> </li> <li id="cite_note-Gibb2003-18"><span class="mw-cite-backlink"><a href="#cite_ref-Gibb2003_18-0">↑</a></span> <span class="reference-text"><span class="citation cita-Journal" id="CITAREFGibb,_Y._L.;_Mumma,_M._J.;_Russo,_N._D.;_Di_Santi,_M._A._y_Magee-Sauer,_K.2003">Gibb, Y. L.; Mumma, M. J.; Russo, N. D.; Di Santi, M. A. y Magee-Sauer, K. (2003). «<a rel="nofollow" class="external text" href="https://dx.doi.org/10.1016/S0019-1035(03)00201-X">Methane in Oort cloud comets</a>». <i>Icarus</i> <b>165</b> (2). <small>p. 391-406</small><span class="printonly">. <a rel="nofollow" class="external free" href="https://dx.doi.org/10.1016/S0019-1035(03)00201-X">http://dx.doi.org/10.1016/S0019-1035(03)00201-X</a></span>.</span><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.atitle=Methane+in+Oort+cloud+comets&rft.jtitle=Icarus&rft.aulast=Gibb%2C+Y.+L.%3B+Mumma%2C+M.+J.%3B+Russo%2C+N.+D.%3B+Di+Santi%2C+M.+A.+y+Magee-Sauer%2C+K.&rft.au=Gibb%2C+Y.+L.%3B+Mumma%2C+M.+J.%3B+Russo%2C+N.+D.%3B+Di+Santi%2C+M.+A.+y+Magee-Sauer%2C+K.&rft.date=2003&rft.volume=165&rft.issue=2&rft_id=http%3A%2F%2Fdx.doi.org%2F10.1016%2FS0019-1035%2803%2900201-X&rfr_id=info:sid/ast.wikipedia.org:Nube_d%27Oort"><span style="display: none;"> </span></span></span> </li> <li id="cite_note-Weissman1997-19"><span class="mw-cite-backlink"><a href="#cite_ref-Weissman1997_19-0">↑</a></span> <span class="reference-text"><span class="citation cita-Journal" id="CITAREFWeissman,_Paul_R._y_Levison,_Harold_F.1997">Weissman, Paul R. y Levison, Harold F. (1997). «<a rel="nofollow" class="external text" href="https://dx.doi.org/10.1086/310940">Origin and Evolution of the Unusual Object 1996 PW: Asteroids from the Oort Cloud?</a>». <i>The Astrophysical Journal Letters</i> <b>488</b> (2). <small>p. L133-L136</small><span class="printonly">. <a rel="nofollow" class="external free" href="https://dx.doi.org/10.1086/310940">http://dx.doi.org/10.1086/310940</a></span>.</span><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.atitle=Origin+and+Evolution+of+the+Unusual+Object+1996+PW%3A+Asteroids+from+the+Oort+Cloud%3F&rft.jtitle=The+Astrophysical+Journal+Letters&rft.aulast=Weissman%2C+Paul+R.+y+Levison%2C+Harold+F.&rft.au=Weissman%2C+Paul+R.+y+Levison%2C+Harold+F.&rft.date=1997&rft.volume=488&rft.issue=2&rft_id=http%3A%2F%2Fdx.doi.org%2F10.1086%2F310940&rfr_id=info:sid/ast.wikipedia.org:Nube_d%27Oort"><span style="display: none;"> </span></span></span> </li> <li id="cite_note-Hutsemekers2005-20"><span class="mw-cite-backlink"><a href="#cite_ref-Hutsemekers2005_20-0">↑</a></span> <span class="reference-text"><span class="citation cita-Journal" id="CITAREFHutsemékers,_D.;_Manfroid,_J.;_Jehin,_Y.;_Arpigny,_C.;_Cochran,_A.;_Schulz,_R.;_Stüwe,_J._A._y_Zucconi_J._M.2005">Hutsemékers, D.; Manfroid, J.; Jehin, Y.; Arpigny, C.; Cochran, A.; Schulz, R.; Stüwe, J. A. y Zucconi J. M. (2005). «<a rel="nofollow" class="external text" href="https://dx.doi.org/10.1051/0004-6361:200500160">Isotopic abundances of carbon and nitrogen in Jupiter-family and Oort Cloud comets</a>». <i>Astronomy & Astrophysics</i> <b>440</b>. <small>p. L21-L24</small><span class="printonly">. <a rel="nofollow" class="external free" href="https://dx.doi.org/10.1051/0004-6361:200500160">http://dx.doi.org/10.1051/0004-6361:200500160</a></span>.</span><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.atitle=Isotopic+abundances+of+carbon+and+nitrogen+in+Jupiter-family+and+Oort+Cloud+comets&rft.jtitle=Astronomy+%26+Astrophysics&rft.aulast=Hutsem%C3%A9kers%2C+D.%3B+Manfroid%2C+J.%3B+Jehin%2C+Y.%3B+Arpigny%2C+C.%3B+Cochran%2C+A.%3B+Schulz%2C+R.%3B+St%C3%BCwe%2C+J.+A.+y+Zucconi+J.+M.&rft.au=Hutsem%C3%A9kers%2C+D.%3B+Manfroid%2C+J.%3B+Jehin%2C+Y.%3B+Arpigny%2C+C.%3B+Cochran%2C+A.%3B+Schulz%2C+R.%3B+St%C3%BCwe%2C+J.+A.+y+Zucconi+J.+M.&rft.date=2005&rft.volume=440&rft_id=http%3A%2F%2Fdx.doi.org%2F10.1051%2F0004-6361%3A200500160&rfr_id=info:sid/ast.wikipedia.org:Nube_d%27Oort"><span style="display: none;"> </span></span></span> </li> <li id="cite_note-Neslusan2000-21"><span class="mw-cite-backlink">↑ <sup><a href="#cite_ref-Neslusan2000_21-0">20,0</a></sup> <sup><a href="#cite_ref-Neslusan2000_21-1">20,1</a></sup></span> <span class="reference-text"><span class="citation cita-Journal" id="CITAREFNeslušan,_L.2000">Neslušan, L. (2000). «<a rel="nofollow" class="external text" href="http://adsabs.harvard.edu/abs/2000A&A...361..369N">The Oort cloud as a remnant of the protosolar nebula</a>». <i>Astronomy and Astrophysics</i> <b>361</b>. <small>p. 369-378</small><span class="printonly">. <a rel="nofollow" class="external free" href="http://adsabs.harvard.edu/abs/2000A&A...361..369N">http://adsabs.harvard.edu/abs/2000A&A...361..369N</a></span>.</span><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.atitle=The+Oort+cloud+as+a+remnant+of+the+protosolar+nebula&rft.jtitle=Astronomy+and+Astrophysics&rft.aulast=Neslu%C5%A1an%2C+L.&rft.au=Neslu%C5%A1an%2C+L.&rft.date=2000&rft.volume=361&rft_id=http%3A%2F%2Fadsabs.harvard.edu%2Fabs%2F2000A%26A...361..369N&rfr_id=info:sid/ast.wikipedia.org:Nube_d%27Oort"><span style="display: none;"> </span></span></span> </li> <li id="cite_note-Ootsubo2007-22"><span class="mw-cite-backlink"><a href="#cite_ref-Ootsubo2007_22-0">↑</a></span> <span class="reference-text"><span class="citation cita-Journal" id="CITAREFOotsubo,_T.;_Watanabe,_J.;_Kawakita,_H.;_Honda_M._y_Furusho_R.2007">Ootsubo, T.; Watanabe, J.; Kawakita, H.; Honda M. y Furusho R. 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J.; Di Santi, M. A.; Magee-Sauer, K.; Bonev, B. P.; Villanueva, G. L.; Kawakita, H.; Russo, N.; Gibb, Y. L.; Blake, G. A.; Lyke, J. Y.; Campbell, R. D.; Aycock, J.; Conrad, A. y Hill G. M. 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Sol Company. Consultáu'l 2 de setiembre de 2008.</span> </li> <li id="cite_note-Levison1999-25"><span class="mw-cite-backlink"><a href="#cite_ref-Levison1999_25-0">↑</a></span> <span class="reference-text"><span class="citation cita-Journal" id="CITAREFLevison,_H.;_Dones,_L.;_Duncan,_M.;_Weissman,_P.1999">Levison, H.; Dones, L.; Duncan, M.; Weissman, P. 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Alan y Weissman, Paul R. (2001). «<a rel="nofollow" class="external text" href="https://dx.doi.org/10.1038/35054508">Rapid collisional evolution of comets during the formation of the Oort cloud</a>». <i>Nature</i> <b>409</b> (6820). <small>p. 589-591</small><span class="printonly">. <a rel="nofollow" class="external free" href="https://dx.doi.org/10.1038/35054508">http://dx.doi.org/10.1038/35054508</a></span>.</span><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.atitle=Rapid+collisional+evolution+of+comets+during+the+formation+of+the+Oort+cloud&rft.jtitle=Nature&rft.aulast=Stern%2C+S.+Alan+y+Weissman%2C+Paul+R.&rft.au=Stern%2C+S.+Alan+y+Weissman%2C+Paul+R.&rft.date=2001&rft.volume=409&rft.issue=6820&rft_id=http%3A%2F%2Fdx.doi.org%2F10.1038%2F35054508&rfr_id=info:sid/ast.wikipedia.org:Nube_d%27Oort"><span style="display: none;"> </span></span></span> </li> <li id="cite_note-Brasser2006-30"><span class="mw-cite-backlink"><a href="#cite_ref-Brasser2006_30-0">↑</a></span> <span class="reference-text"><span class="citation cita-Journal" id="CITAREFBrasser,_R.;_Duncan,_M_.J._y_Levison,_H._F.2006">Brasser, R.; Duncan, M .J. y Levison, H. F. 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Y. y Dones, L. (1998). «Comet Populations and Cometary dynamics», <i>Encyclopedia of the Solar System</i>. p. 575-588, Academic Press.</cite></span> </li> <li id="cite_note-Horner2003-33"><span class="mw-cite-backlink"><a href="#cite_ref-Horner2003_33-0">↑</a></span> <span class="reference-text"><span class="citation cita-Journal" id="CITAREFHorner,_J.,_Evans,_N.W.;_Bailey,_M.Y._y_Asher_D.J.2003">Horner, J., Evans, N.W.; Bailey, M.Y. y Asher D.J. 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Archiváu dende l'<a rel="nofollow" class="external text" href="http://pdf.astroplaneta.org/es/id20404.pdf">orixinal</a>, el 26 de payares de 2015. Consultáu'l 4 de setiembre de 2008.</span> </li> <li id="cite_note-Dones2004-36"><span class="mw-cite-backlink"><a href="#cite_ref-Dones2004_36-0">↑</a></span> <span class="reference-text"><span class="citation cita-Journal" id="CITAREFDones,_L.;_Weissman,_P._R.;_Levison,_H._F.;_Duncan,_M._J.2004">Dones, L.; Weissman, P. R.; Levison, H. F.; Duncan, M. J. 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American Scientist. Archiváu dende l'<a rel="nofollow" class="external text" href="http://www.americanscientist.org/issues/pub/perturbing-the-oort-cloud">orixinal</a>, el 2009-02-13. Consultáu'l 15 de setiembre de 2009.</span> </li> <li id="cite_note-Leitch1998-47"><span class="mw-cite-backlink"><a href="#cite_ref-Leitch1998_47-0">↑</a></span> <span class="reference-text"><span class="citation cita-Journal" id="CITAREFLeitch,_Y.M._y_Vasisht,_G.1998">Leitch, Y.M. y Vasisht, G. 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A. (1984). «<a rel="nofollow" class="external text" href="https://web.archive.org/web/20080908180900/http://links.isiglobalnet2.com/gateway/Gateway.cgi">Extinction of Species by Periodic Comet Showers</a>». <i>Nature</i> <b>308</b>. <small>p. 715-717</small>. Archivado del <a rel="nofollow" class="external text" href="http://links.isiglobalnet2.com/gateway/Gateway.cgi?&GWVersion=2&SrcAuth=Nature&SrcApp=Nature&DestLinkType=FullRecord&KeyUT=A1984SM96000043&DestApp=WOS_CPL">original</a> el 2008-09-08<span class="printonly">. <a rel="nofollow" class="external free" href="https://web.archive.org/web/20080908180900/http://links.isiglobalnet2.com/gateway/Gateway.cgi">https://web.archive.org/web/20080908180900/http://links.isiglobalnet2.com/gateway/Gateway.cgi</a></span><span class="reference-accessdate">. Consultáu'l 2017-10-21</span>.</span><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.atitle=Extinction+of+Species+by+Periodic+Comet+Showers&rft.jtitle=Nature&rft.aulast=Davis%2C+M.%3B+Hut%2C+P.+y+Muller%2C+R.+A.&rft.au=Davis%2C+M.%3B+Hut%2C+P.+y+Muller%2C+R.+A.&rft.date=1984&rft.volume=308&rft_id=https%3A%2F%2Fweb.archive.org%2Fweb%2F20080908180900%2Fhttp%3A%2F%2Flinks.isiglobalnet2.com%2Fgateway%2FGateway.cgi&rfr_id=info:sid/ast.wikipedia.org:Nube_d%27Oort"><span style="display: none;"> </span></span></span> </li> <li id="cite_note-Hills1984-52"><span class="mw-cite-backlink"><a href="#cite_ref-Hills1984_52-0">↑</a></span> <span class="reference-text"><span class="citation cita-Journal" id="CITAREFHills,_J._G.1984">Hills, J. G. (1984). «<a rel="nofollow" class="external text" href="https://dx.doi.org/10.1038/311636a0">Dynamical constraints on the mass and perihelion distance of Nemesis and the stability of its orbit</a>». <i>Nature</i> <b>311</b> (5987). <small>p. 636-638</small><span class="printonly">. <a rel="nofollow" class="external free" href="https://dx.doi.org/10.1038/311636a0">http://dx.doi.org/10.1038/311636a0</a></span>.</span><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.atitle=Dynamical+constraints+on+the+mass+and+perihelion+distance+of+Nemesis+and+the+stability+of+its+orbit&rft.jtitle=Nature&rft.aulast=Hills%2C+J.+G.&rft.au=Hills%2C+J.+G.&rft.date=1984&rft.volume=311&rft.issue=5987&rft_id=http%3A%2F%2Fdx.doi.org%2F10.1038%2F311636a0&rfr_id=info:sid/ast.wikipedia.org:Nube_d%27Oort"><span style="display: none;"> </span></span></span> </li> <li id="cite_note-Matese2002-53"><span class="mw-cite-backlink"><a href="#cite_ref-Matese2002_53-0">↑</a></span> <span class="reference-text"><span class="citation cita-Journal" id="CITAREFMatese,_J._J._y_Lissauer,_J._J.2002">Matese, J. J. y Lissauer, J. J. (2002). «<a rel="nofollow" class="external text" href="http://ads.ari.uni-heidelberg.de/abs/2002ESASP.500..309M">Continuing evidence of an impulsive component of Oort cloud cometary flux</a>». <i>Proceedings of Asteroids, Comets, Meteors</i>. <small>p. 309-314, <a href="/wiki/Especial:FuentesDeLibros/9290928107" class="internal mw-magiclink-isbn">ISBN 92-9092-810-7</a></small><span class="printonly">. <a rel="nofollow" class="external free" href="http://ads.ari.uni-heidelberg.de/abs/2002ESASP.500..309M">http://ads.ari.uni-heidelberg.de/abs/2002ESASP.500..309M</a></span>.</span><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.atitle=Continuing+evidence+of+an+impulsive+component+of+Oort+cloud+cometary+flux&rft.jtitle=Proceedings+of+Asteroids%2C+Comets%2C+Meteors&rft.aulast=Matese%2C+J.+J.+y+Lissauer%2C+J.+J.&rft.au=Matese%2C+J.+J.+y+Lissauer%2C+J.+J.&rft.date=2002&rft_id=http%3A%2F%2Fads.ari.uni-heidelberg.de%2Fabs%2F2002ESASP.500..309M&rfr_id=info:sid/ast.wikipedia.org:Nube_d%27Oort"><span style="display: none;"> </span></span></span> </li> <li id="cite_note-Brown2004-54"><span class="mw-cite-backlink"><a href="#cite_ref-Brown2004_54-0">↑</a></span> <span class="reference-text"><span class="citation cita-Journal" id="CITAREFBrown,_M._Y.;_Trujillo,_C.;_Rabinowitz,_D.2004">Brown, M. Y.; Trujillo, C.; Rabinowitz, D. (2004). «<a rel="nofollow" class="external text" href="https://dx.doi.org/10.1086/422095">Discovery of a Candidate Inner Oort Cloud Planetoid</a>». <i>The Astrophysical Journal</i> <b>617</b>. <small>p. 645-649</small><span class="printonly">. <a rel="nofollow" class="external free" href="https://dx.doi.org/10.1086/422095">http://dx.doi.org/10.1086/422095</a></span>.</span><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.atitle=Discovery+of+a+Candidate+Inner+Oort+Cloud+Planetoid&rft.jtitle=The+Astrophysical+Journal&rft.aulast=Brown%2C+M.+Y.%3B+Trujillo%2C+C.%3B+Rabinowitz%2C+D.&rft.au=Brown%2C+M.+Y.%3B+Trujillo%2C+C.%3B+Rabinowitz%2C+D.&rft.date=2004&rft.volume=617&rft_id=http%3A%2F%2Fdx.doi.org%2F10.1086%2F422095&rfr_id=info:sid/ast.wikipedia.org:Nube_d%27Oort"><span style="display: none;"> </span></span></span> </li> <li id="cite_note-Sheppard2005-55"><span class="mw-cite-backlink">↑ <sup><a href="#cite_ref-Sheppard2005_55-0">53,0</a></sup> <sup><a href="#cite_ref-Sheppard2005_55-1">53,1</a></sup></span> <span class="reference-text"><span class="citation cita-Journal" id="CITAREFSheppard,_S._S.2005">Sheppard, S. S. (2005). «<a rel="nofollow" class="external text" href="http://adsabs.harvard.edu/abs/2006ASPC..352....3S">Small Bodies in the Outer Solar System</a>». <i>New Horizons in Astronomy: Frank N. Bash Symposium</i> <b>352</b> (Ochobre). <small>The University of Texas, Austin, Texas, USA</small><span class="printonly">. <a rel="nofollow" class="external free" href="http://adsabs.harvard.edu/abs/2006ASPC..352....3S">http://adsabs.harvard.edu/abs/2006ASPC..352....3S</a></span>.</span><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.atitle=Small+Bodies+in+the+Outer+Solar+System&rft.jtitle=New+Horizons+in+Astronomy%3A+Frank+N.+Bash+Symposium&rft.aulast=Sheppard%2C+S.+S.&rft.au=Sheppard%2C+S.+S.&rft.date=2005&rft.volume=352&rft.issue=Ochobre&rft_id=http%3A%2F%2Fadsabs.harvard.edu%2Fabs%2F2006ASPC..352....3S&rfr_id=info:sid/ast.wikipedia.org:Nube_d%27Oort"><span style="display: none;"> </span></span></span> </li> <li id="cite_note-Gomes2006-56"><span class="mw-cite-backlink"><a href="#cite_ref-Gomes2006_56-0">↑</a></span> <span class="reference-text"><span class="citation cita-Journal" id="CITAREFGomes,_R._S.;_Matese,_J._J._y_Lissauer,_J._J.2006">Gomes, R. S.; Matese, J. J. y Lissauer, J. J. (2006). «<a rel="nofollow" class="external text" href="https://dx.doi.org/10.1016/j.icarus.2006.05.026">A distant planetary-mass solar companion may have produced distant detached objects</a>». <i>Icarus</i> <b>184</b> (2). <small>p. 589-601</small><span class="printonly">. <a rel="nofollow" class="external free" href="https://dx.doi.org/10.1016/j.icarus.2006.05.026">http://dx.doi.org/10.1016/j.icarus.2006.05.026</a></span>.</span><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.atitle=A+distant+planetary-mass+solar+companion+may+have+produced+distant+detached+objects&rft.jtitle=Icarus&rft.aulast=Gomes%2C+R.+S.%3B+Matese%2C+J.+J.+y+Lissauer%2C+J.+J.&rft.au=Gomes%2C+R.+S.%3B+Matese%2C+J.+J.+y+Lissauer%2C+J.+J.&rft.date=2006&rft.volume=184&rft.issue=2&rft_id=http%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.icarus.2006.05.026&rfr_id=info:sid/ast.wikipedia.org:Nube_d%27Oort"><span style="display: none;"> </span></span></span> </li> </ol></div> <div class="mw-heading mw-heading2"><h2 id="Enllaces_esternos">Enllaces esternos</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Nube_d%27Oort&veaction=edit&section=13" title="Editar seición: Enllaces esternos" class="mw-editsection-visualeditor"><span>editar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Nube_d%27Oort&action=edit&section=13" title="Editar el código fuente de la sección: Enllaces esternos"><span>editar la fonte</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a rel="nofollow" class="external text" href="https://web.archive.org/web/20041015203349/http://www.astrogea.org/asteroides/oort.htm">"Nube d'Oort" en Astrogea</a></li> <li><a rel="nofollow" class="external text" href="http://www.gps.caltech.edu/~mbrown/sedna/">Descubrimientu de Sedna</a></li> <li><span class="broken-link">"Nube d'Oort" en Astromía</span> <span class="plainlinks" style="background-color:var(--background-color-warning-subtle, #fdf2d5); color:inherit; font-size:85%">(<a href="/wiki/Ayuda:C%C3%B3mo_recuperar_un_enllaz_rotu" class="mw-redirect" title="Ayuda:Cómo recuperar un enllaz rotu">enllaz rotu</a> disponible n'<a href="/wiki/Internet_Archive" title="Internet Archive">Internet Archive</a>; ver l'<a rel="nofollow" class="external text" href="//web.archive.org/web/*/http://www.astromia.com/astronomia/cometes_oort.htm">historial</a> y la <a rel="nofollow" class="external text" href="//web.archive.org/web/2/http://www.astromia.com/astronomia/cometes_oort.htm">última versión</a>).</span></li> <li><a rel="nofollow" class="external text" href="https://web.archive.org/web/http://212.170.234.89/educared/y7_nube_oort.htm">Educared (con ilustración)</a></li> <li><a rel="nofollow" class="external text" href="https://web.archive.org/web/http://www.planetarios.com/Manual-Cilindru-Sistema-Solar/cometes.html">"Cometes", en Planetarios</a></li> <li><a rel="nofollow" class="external text" href="http://astronopedia.com.mx/web/node/4">Artículu "Nube d'Oort: la llende solar"</a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20160310175318/http://astronopedia.com.mx/web/node/4">Archiváu</a> 2016-03-10 en <a href="/wiki/Wayback_Machine" title="Wayback Machine">Wayback Machine</a> en <a rel="nofollow" class="external text" href="http://www.astronopedia.com.mx">Astronopedia</a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20190723080028/http://astronopedia.com.mx/">Archiváu</a> 2019-07-23 en <a href="/wiki/Wayback_Machine" title="Wayback Machine">Wayback Machine</a>.</li></ul> <style data-mw-deduplicate="TemplateStyles:r2260362">.mw-parser-output .mw-authority-control .navbox hr:last-child{display:none}.mw-parser-output .mw-authority-control .navbox+.mw-mf-linked-projects{display:none}.mw-parser-output .mw-authority-control 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.navbox-group,.mw-parser-output .navbox-subgroup .navbox-title{background-color:#ddf}.mw-parser-output .navbox-subgroup .navbox-group,.mw-parser-output .navbox-subgroup .navbox-abovebelow{background-color:#e6e6ff}.mw-parser-output .navbox-even{background-color:#f7f7f7}.mw-parser-output .navbox-odd{background-color:transparent}.mw-parser-output .navbox .hlist td dl,.mw-parser-output .navbox .hlist td ol,.mw-parser-output .navbox .hlist td ul,.mw-parser-output .navbox td.hlist dl,.mw-parser-output .navbox td.hlist ol,.mw-parser-output .navbox td.hlist ul{padding:0.125em 0}.mw-parser-output .navbox .navbar{display:block;font-size:100%}.mw-parser-output .navbox-title .navbar{float:left;text-align:left;margin-right:0.5em}</style></div><div role="navigation" class="navbox" aria-labelledby="Control_d&#039;autoridaes" style="padding:3px"><table class="nowraplinks hlist navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th id="Control_d&#039;autoridaes" scope="row" class="navbox-group" style="width:1%;width: 12%; text-align:center;"><a href="/wiki/Ayuda:Control_d%27autoridaes" title="Ayuda:Control d'autoridaes">Control d'autoridaes</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><b>Proyeutos Wikimedia</b></li> <li><span style="white-space:nowrap;"><span typeof="mw:File"><a href="/wiki/Wikidata" title="Wikidata"><img alt="Wd" src="//upload.wikimedia.org/wikipedia/commons/thumb/f/ff/Wikidata-logo.svg/20px-Wikidata-logo.svg.png" decoding="async" width="20" height="11" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/ff/Wikidata-logo.svg/30px-Wikidata-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/ff/Wikidata-logo.svg/40px-Wikidata-logo.svg.png 2x" data-file-width="1050" data-file-height="590" /></a></span> Datos:</span> <span class="uid"><a href="https://www.wikidata.org/wiki/Q40864" class="extiw" title="wikidata:Q40864">Q40864</a></span></li> <li><span style="white-space:nowrap;"><span typeof="mw:File"><a href="/wiki/Wikimedia_Commons" title="Commonscat"><img alt="Commonscat" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/15px-Commons-logo.svg.png" decoding="async" width="15" height="20" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/23px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/30px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></a></span> Multimedia:</span> <span class="uid"><span class="plainlinks"><a class="external text" href="https://commons.wikimedia.org/wiki/Category:Oort_cloud">Oort cloud</a></span></span></li></ul> <hr /> <ul><li><b>Identificadores</b></li> <li><a rel="nofollow" class="external text" href="//www.worldcat.org/identities/containsVIAFID/307321359">WorldCat</a></li> <li><span style="white-space:nowrap;"><a href="/wiki/Virtual_International_Authority_File" class="mw-redirect" title="Virtual International Authority File">VIAF</a>:</span> <span class="uid"><a rel="nofollow" class="external text" href="https://viaf.org/viaf/307321359/">307321359</a></span></li> <li><span style="white-space:nowrap;"><a href="/wiki/Library_of_Congress_Control_Number" class="mw-redirect" title="Library of Congress Control Number">LCCN</a>:</span> <span class="uid"><a rel="nofollow" class="external text" href="https://id.loc.gov/authorities/sh86000523">sh86000523</a></span></li> <li><b>Diccionarios y enciclopedies</b></li> <li><span style="white-space:nowrap;"><a href="/wiki/Enciclopedia_Brit%C3%A1nica" class="mw-redirect" title="Enciclopedia Británica">Britannica</a>:</span> <span class="uid"><a rel="nofollow" class="external text" href="https://www.britannica.com/topic/Oort-cloud">url</a></span></li></ul> </div></td></tr></tbody></table></div><div class="mw-mf-linked-projects hlist"> <ul><li><span style="white-space:nowrap;"><span typeof="mw:File"><a href="/wiki/Wikidata" title="Wikidata"><img alt="Wd" src="//upload.wikimedia.org/wikipedia/commons/thumb/f/ff/Wikidata-logo.svg/20px-Wikidata-logo.svg.png" decoding="async" width="20" height="11" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/ff/Wikidata-logo.svg/30px-Wikidata-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/ff/Wikidata-logo.svg/40px-Wikidata-logo.svg.png 2x" data-file-width="1050" data-file-height="590" /></a></span> Datos:</span> <span class="uid"><a href="https://www.wikidata.org/wiki/Q40864" class="extiw" title="wikidata:Q40864">Q40864</a></span></li> <li><span style="white-space:nowrap;"><span typeof="mw:File"><a href="/wiki/Wikimedia_Commons" title="Commonscat"><img alt="Commonscat" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/15px-Commons-logo.svg.png" decoding="async" width="15" height="20" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/23px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/30px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></a></span> Multimedia:</span> <span class="uid"><span class="plainlinks"><a class="external text" href="https://commons.wikimedia.org/wiki/Category:Oort_cloud">Oort cloud</a></span></span></li></ul> </div></div> <!-- NewPP limit report Parsed by mw‐api‐int.codfw.main‐849f99967d‐rsd7h Cached time: 20241122105629 Cache expiry: 2592000 Reduced expiry: false Complications: [show‐toc] CPU time usage: 0.972 seconds Real time usage: 1.181 seconds Preprocessor visited node count: 49343/1000000 Post‐expand include size: 247705/2097152 bytes Template argument size: 86077/2097152 bytes Highest expansion depth: 19/100 Expensive parser function count: 6/500 Unstrip recursion depth: 1/20 Unstrip post‐expand size: 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