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class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">mòu a la barra laterala</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">Escondre</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">Començament</div> </a> </li> <li id="toc-Istòria" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Istòria"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Istòria</span> </div> </a> <ul id="toc-Istòria-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Formacion_e_estructura" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Formacion_e_estructura"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Formacion e estructura</span> </div> </a> <button aria-controls="toc-Formacion_e_estructura-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>Commuta la subsecció Formacion e estructura</span> </button> <ul id="toc-Formacion_e_estructura-sublist" class="vector-toc-list"> <li id="toc-Formacion" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Formacion"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.1</span> <span>Formacion</span> </div> </a> <ul id="toc-Formacion-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Estructura_e_composicion" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Estructura_e_composicion"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.2</span> <span>Estructura e composicion</span> </div> </a> <ul id="toc-Estructura_e_composicion-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Observacion_e_exploracion" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Observacion_e_exploracion"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Observacion e exploracion</span> </div> </a> <ul id="toc-Observacion_e_exploracion-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Annèxas" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Annèxas"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Annèxas</span> </div> </a> <button aria-controls="toc-Annèxas-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>Commuta la subsecció Annèxas</span> </button> <ul id="toc-Annèxas-sublist" class="vector-toc-list"> <li id="toc-Liames_intèrnes" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Liames_intèrnes"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.1</span> <span>Liames intèrnes</span> </div> </a> <ul id="toc-Liames_intèrnes-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Bibliografia" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Bibliografia"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.2</span> <span>Bibliografia</span> </div> </a> <ul id="toc-Bibliografia-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Nòtas_e_referéncias" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Nòtas_e_referéncias"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.3</span> <span>Nòtas e referéncias</span> </div> </a> <ul id="toc-Nòtas_e_referéncias-sublist" class="vector-toc-list"> </ul> </li> </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="Somari" 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="Commuta la taula de continguts." > <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">Commuta la taula de continguts.</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">Nívol 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="Vés a un article en una altra llengua. Disponible en 95 llengües" > <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 lengas</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 - arabi" lang="ar" hreflang="ar" data-title="سحابة أورط" data-language-autonym="العربية" data-language-local-name="arabi" 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 - arabe marocain" lang="ary" hreflang="ary" data-title="غيامة د ؤرت" data-language-autonym="الدارجة" data-language-local-name="arabe marocain" 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 - assamès" lang="as" hreflang="as" data-title="উৰ্ট মেঘ" data-language-autonym="অসমীয়া" data-language-local-name="assamès" class="interlanguage-link-target"><span>অসমীয়া</span></a></li><li class="interlanguage-link interwiki-ast mw-list-item"><a href="https://ast.wikipedia.org/wiki/Nube_d%27Oort" title="Nube d'Oort - asturian" lang="ast" hreflang="ast" data-title="Nube d'Oort" data-language-autonym="Asturianu" data-language-local-name="asturian" class="interlanguage-link-target"><span>Asturianu</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/Oort_buludu" title="Oort buludu - azerbaijani" lang="az" hreflang="az" data-title="Oort buludu" data-language-autonym="Azərbaycanca" data-language-local-name="azerbaijani" 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 - bavarès" lang="bar" hreflang="bar" data-title="Oortsche Woikn" data-language-autonym="Boarisch" data-language-local-name="bavarès" 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 - belarús" lang="be" hreflang="be" data-title="Воблака Оарта" data-language-autonym="Беларуская" data-language-local-name="belarús" 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 - bulgar" lang="bg" hreflang="bg" data-title="Облак на Оорт" data-language-autonym="Български" data-language-local-name="bulgar" 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 - bengalin" lang="bn" hreflang="bn" data-title="উর্ট মেঘ" data-language-autonym="বাংলা" data-language-local-name="bengalin" 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 - breton" lang="br" hreflang="br" data-title="Koumoulennad Oort" data-language-autonym="Brezhoneg" data-language-local-name="breton" 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 - bosniac" lang="bs" hreflang="bs" data-title="Oortov oblak" data-language-autonym="Bosanski" data-language-local-name="bosniac" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-ca badge-Q17437796 badge-featuredarticle mw-list-item" title="articles de qualitat"><a href="https://ca.wikipedia.org/wiki/N%C3%BAvol_d%27Oort" title="Núvol d'Oort - catalan" lang="ca" hreflang="ca" data-title="Núvol d'Oort" data-language-autonym="Català" data-language-local-name="catalan" 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 - chèc" lang="cs" hreflang="cs" data-title="Oortův oblak" data-language-autonym="Čeština" data-language-local-name="chèc" 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 - gal·lès" lang="cy" hreflang="cy" data-title="Cwmwl Oort" data-language-autonym="Cymraeg" data-language-local-name="gal·lès" 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 - alemand" lang="de" hreflang="de" data-title="Oortsche Wolke" data-language-autonym="Deutsch" data-language-local-name="alemand" 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 - grèc" lang="el" hreflang="el" data-title="Νέφος του Όορτ" data-language-autonym="Ελληνικά" data-language-local-name="grèc" 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="articles de qualitat"><a href="https://en.wikipedia.org/wiki/Oort_cloud" title="Oort cloud - anglés" lang="en" hreflang="en" data-title="Oort cloud" data-language-autonym="English" data-language-local-name="anglés" 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="articles de qualitat"><a href="https://es.wikipedia.org/wiki/Nube_de_Oort" title="Nube de Oort - espanhòl" lang="es" hreflang="es" data-title="Nube de Oort" data-language-autonym="Español" data-language-local-name="espanhòl" 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 - estonian" lang="et" hreflang="et" data-title="Öpiku-Oorti pilv" data-language-autonym="Eesti" data-language-local-name="estonian" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-eu badge-Q17437796 badge-featuredarticle mw-list-item" title="articles de qualitat"><a href="https://eu.wikipedia.org/wiki/Oorten_hodeia" title="Oorten hodeia - basc" lang="eu" hreflang="eu" data-title="Oorten hodeia" data-language-autonym="Euskara" data-language-local-name="basc" 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 - perse" lang="fa" hreflang="fa" data-title="ابر اورت" data-language-autonym="فارسی" data-language-local-name="perse" 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 - gaelic escossés" lang="gd" hreflang="gd" data-title="Neul Oort" data-language-autonym="Gàidhlig" data-language-local-name="gaelic escossés" class="interlanguage-link-target"><span>Gàidhlig</span></a></li><li class="interlanguage-link interwiki-gl badge-Q17437796 badge-featuredarticle mw-list-item" title="articles de qualitat"><a href="https://gl.wikipedia.org/wiki/Nube_de_Oort" title="Nube de Oort - galician" lang="gl" hreflang="gl" data-title="Nube de Oort" data-language-autonym="Galego" data-language-local-name="galician" 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 - ebrèu" lang="he" hreflang="he" data-title="עננת אורט" data-language-autonym="עברית" data-language-local-name="ebrèu" 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 - Indi" lang="hi" hreflang="hi" data-title="और्ट बादल" data-language-autonym="हिन्दी" data-language-local-name="Indi" 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 - croat" lang="hr" hreflang="hr" data-title="Oortov oblak" data-language-autonym="Hrvatski" data-language-local-name="croat" 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 - ongrés" lang="hu" hreflang="hu" data-title="Oort-felhő" data-language-autonym="Magyar" data-language-local-name="ongrés" 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 - armèni" lang="hy" hreflang="hy" data-title="Օորտի ամպ" data-language-autonym="Հայերեն" data-language-local-name="armèni" 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 - indonesian" lang="id" hreflang="id" data-title="Awan Oort" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonesian" 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 - italian" lang="it" hreflang="it" data-title="Nube di Oort" data-language-autonym="Italiano" data-language-local-name="italian" 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 - japonés" lang="ja" hreflang="ja" data-title="オールトの雲" data-language-autonym="日本語" data-language-local-name="japonés" 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 - javanés" lang="jv" hreflang="jv" data-title="Méga Oort" data-language-autonym="Jawa" data-language-local-name="javanés" 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 - georgian" lang="ka" hreflang="ka" data-title="ოორტის ღრუბელი" data-language-autonym="ქართული" data-language-local-name="georgian" 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 - kannada" lang="kn" hreflang="kn" data-title="ಊರ್ಟ್ ಮೋಡ" data-language-autonym="ಕನ್ನಡ" data-language-local-name="kannada" 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 - corean" lang="ko" hreflang="ko" data-title="오르트 구름" data-language-autonym="한국어" data-language-local-name="corean" 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 - kölsch" lang="ksh" hreflang="ksh" data-title="Oortsche Wolke" data-language-autonym="Ripoarisch" data-language-local-name="kölsch" 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 - latin" lang="la" hreflang="la" data-title="Nubes Oort" data-language-autonym="Latina" data-language-local-name="latin" 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 - luxemborgés" lang="lb" hreflang="lb" data-title="Oort-Wollek" data-language-autonym="Lëtzebuergesch" data-language-local-name="luxemborgés" 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 - limburguès" lang="li" hreflang="li" data-title="Oortwolk" data-language-autonym="Limburgs" data-language-local-name="limburguès" 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 - llombard" lang="lmo" hreflang="lmo" data-title="Nigol de Oort" data-language-autonym="Lombard" data-language-local-name="llombard" 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 - lituan" lang="lt" hreflang="lt" data-title="Orto kometoidų debesis" data-language-autonym="Lietuvių" data-language-local-name="lituan" 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 - leton" lang="lv" hreflang="lv" data-title="Orta mākonis" data-language-autonym="Latviešu" data-language-local-name="leton" 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 - macedonian" lang="mk" hreflang="mk" data-title="Ортов Облак" data-language-autonym="Македонски" data-language-local-name="macedonian" 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 - malaiàlam" lang="ml" hreflang="ml" data-title="ഒർട്ട് മേഘം" data-language-autonym="മലയാളം" data-language-local-name="malaiàlam" 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 - malai" lang="ms" hreflang="ms" data-title="Awan Oort" data-language-autonym="Bahasa Melayu" data-language-local-name="malai" 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 - birman" lang="my" hreflang="my" data-title="အောတိမ်တိုက်" data-language-autonym="မြန်မာဘာသာ" data-language-local-name="birman" 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 - baix alemany" lang="nds" hreflang="nds" data-title="Oortsche Wulk" data-language-autonym="Plattdüütsch" data-language-local-name="baix alemany" 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 - norvegian nynorsk" lang="nn" hreflang="nn" data-title="Oortskya" data-language-autonym="Norsk nynorsk" data-language-local-name="norvegian 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 - norvegian bokmål" lang="nb" hreflang="nb" data-title="Oorts sky" data-language-autonym="Norsk bokmål" data-language-local-name="norvegian bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-pl badge-Q17437796 badge-featuredarticle mw-list-item" title="articles de qualitat"><a href="https://pl.wikipedia.org/wiki/Ob%C5%82ok_Oorta" title="Obłok Oorta - polonés" lang="pl" hreflang="pl" data-title="Obłok Oorta" data-language-autonym="Polski" data-language-local-name="polonés" 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="articles de qualitat"><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 - romanés" lang="ro" hreflang="ro" data-title="Norul lui Oort" data-language-autonym="Română" data-language-local-name="romanés" 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 - rus" lang="ru" hreflang="ru" data-title="Облако Оорта" data-language-autonym="Русский" data-language-local-name="rus" 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 - sicilian" lang="scn" hreflang="scn" data-title="Nubbi di Oort" data-language-autonym="Sicilianu" data-language-local-name="sicilian" 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 - escossés" lang="sco" hreflang="sco" data-title="Oort clood" data-language-autonym="Scots" data-language-local-name="escossés" 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 - serbocroat" lang="sh" hreflang="sh" data-title="Oortov oblak" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="serbocroat" 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 - eslovac" lang="sk" hreflang="sk" data-title="Oortov mrak komét" data-language-autonym="Slovenčina" data-language-local-name="eslovac" 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 - eslovèn" lang="sl" hreflang="sl" data-title="Oortov oblak" data-language-autonym="Slovenščina" data-language-local-name="eslovèn" 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 - serbi" lang="sr" hreflang="sr" data-title="Ортов облак" data-language-autonym="Српски / srpski" data-language-local-name="serbi" 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 - suedés" lang="sv" hreflang="sv" data-title="Oorts kometmoln" data-language-autonym="Svenska" data-language-local-name="suedés" 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 - swahili" lang="sw" hreflang="sw" data-title="Wingu la Oort" data-language-autonym="Kiswahili" data-language-local-name="swahili" 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 - telogó" lang="te" hreflang="te" data-title="ఊర్ట్ మేఘం" data-language-autonym="తెలుగు" data-language-local-name="telogó" 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 - tajic" lang="tg" hreflang="tg" data-title="Абри оорт" data-language-autonym="Тоҷикӣ" data-language-local-name="tajic" 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 - tai" lang="th" hreflang="th" data-title="เมฆออร์ต" data-language-autonym="ไทย" data-language-local-name="tai" 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 - tagal" lang="tl" hreflang="tl" data-title="Ulap na Oort" data-language-autonym="Tagalog" data-language-local-name="tagal" 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 - turc" lang="tr" hreflang="tr" data-title="Oort bulutu" data-language-autonym="Türkçe" data-language-local-name="turc" 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 - tatar" lang="tt" hreflang="tt" data-title="Оорт болыты" data-language-autonym="Татарча / tatarça" data-language-local-name="tatar" 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 - ucrainés" lang="uk" hreflang="uk" data-title="Хмара Оорта" data-language-autonym="Українська" data-language-local-name="ucrainés" 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 - ordó" lang="ur" hreflang="ur" data-title="اورت بادل" data-language-autonym="اردو" data-language-local-name="ordó" 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 - ozbèc" lang="uz" hreflang="uz" data-title="Oort buluti" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="ozbèc" 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 - vènet" lang="vec" hreflang="vec" data-title="Nube de Oort" data-language-autonym="Vèneto" data-language-local-name="vènet" 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 - vietnamian" lang="vi" hreflang="vi" data-title="Đám mây Oort" data-language-autonym="Tiếng Việt" data-language-local-name="vietnamian" 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 - 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id="mw-indicator-dialecte-provençau" class="mw-indicator"><div class="mw-parser-output"><span title="Aqueste article es redigit en provençau."><span class="mw-default-size mw-image-border" typeof="mw:File"><a href="//oc.wikipedia.org/wiki/Proven%C3%A7au"><img alt="Aqueste article es redigit en provençau." src="//upload.wikimedia.org/wikipedia/commons/thumb/6/6f/Flag_of_Provence.svg/30px-Flag_of_Provence.svg.png" decoding="async" width="30" height="20" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/6f/Flag_of_Provence.svg/45px-Flag_of_Provence.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/6f/Flag_of_Provence.svg/60px-Flag_of_Provence.svg.png 2x" data-file-width="1125" data-file-height="750" /></a></span></span></div></div> </div> <div id="siteSub" class="noprint">Un article de Wikipèdia, l'enciclopèdia liura.</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="oc" dir="ltr"><p class="mw-empty-elt"> </p> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Fichi%C3%A8r:Kuiper_belt_-_Oort_cloud-fr.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/2/29/Kuiper_belt_-_Oort_cloud-fr.svg/290px-Kuiper_belt_-_Oort_cloud-fr.svg.png" decoding="async" width="290" height="249" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/29/Kuiper_belt_-_Oort_cloud-fr.svg/435px-Kuiper_belt_-_Oort_cloud-fr.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/29/Kuiper_belt_-_Oort_cloud-fr.svg/580px-Kuiper_belt_-_Oort_cloud-fr.svg.png 2x" data-file-width="512" data-file-height="439" /></a><figcaption>Vista artistica de la cencha de Kuiper e de la nívol d'Oort.</figcaption></figure> <p>Lo <b>Nívol de Oort</b> (ò <b>nívol d'Öpik-Oort</b> ò <b>nívol d'Oort</b>) es un ensemble <a href="/wiki/Esf%C3%A8ra" title="Esfèra">esferic</a> <a href="/w/index.php?title=Ipot%C3%A8sia&action=edit&redlink=1" class="new" title="Ipotèsia (la pagina existís pas)">ipotetic</a> d'objèctes astronomics que seriá situat entre 100 e 150 000 <a href="/wiki/Unitat_astronomica" title="Unitat astronomica">unitats astronomicas</a> dau <a href="/wiki/Soleu" title="Soleu">Soleu</a>. Son limit pus extèrne seriá lo limit dau <a href="/wiki/Sist%C3%A8ma_Solar" title="Sistèma Solar">Sistèma Solar</a>. En 2020, l'existéncia d'aquela estructura es pas encara demostrada. Pasmens, lo nívol de Oort es integrat dins la màger part dei modèls dau <a href="/wiki/Sist%C3%A8ma_Solar" title="Sistèma Solar">Sistèma Solar</a>. Format de miliards de còrs <a href="/wiki/R%C3%B2ca" title="Ròca">rocassós</a> e <a href="/wiki/Gla%C3%A7_(astronomia)" title="Glaç (astronomia)">glaçats</a>, es considerat coma la fònt dei <a href="/wiki/Cometa" title="Cometa">cometas</a> de periòde lòng. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Istòria"><span id="Ist.C3.B2ria"></span>Istòria</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=N%C3%ADvol_d%27Oort&veaction=edit&section=1" title="Modificar la seccion : Istòria" class="mw-editsection-visualeditor"><span>modificar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=N%C3%ADvol_d%27Oort&action=edit&section=1" title="Edita el codi de la secció: Istòria"><span>Modificar lo còdi</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/Fichi%C3%A8r:JanOort3.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/2/2f/JanOort3.png/220px-JanOort3.png" decoding="async" width="220" height="326" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/2f/JanOort3.png/330px-JanOort3.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/2f/JanOort3.png/440px-JanOort3.png 2x" data-file-width="591" data-file-height="875" /></a><figcaption>Retrach de <a href="/w/index.php?title=Jan_Oort&action=edit&redlink=1" class="new" title="Jan Oort (la pagina existís pas)">Jan Oort</a>.</figcaption></figure> <p>La premiera evocacion de l'existéncia d'una sèrva de <a href="/wiki/Cometa" title="Cometa">cometas</a> es atribuïda a l'<a href="/wiki/Astronomia" title="Astronomia">astronòm</a> <a href="/wiki/Anglat%C3%A8rra" title="Anglatèrra">anglés</a> <a href="/wiki/Edmond_Halley" title="Edmond Halley">Edmond Halley</a> (1656-1742) dins son trabalh de 1705 sus la <a href="/wiki/Cometa_de_Halley" title="Cometa de Halley">cometa que pòrta son nom</a><sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup>. L'idèa foguèt represa en 1932 per l'astronòm <a href="/wiki/Est%C3%B2nia" title="Estònia">estonian</a> <a href="/w/index.php?title=Ernst_%C3%96pik&action=edit&redlink=1" class="new" title="Ernst Öpik (la pagina existís pas)">Ernst Öpik</a> (1893-1985) qu'emetèt una ipotèsi similara. Segon eu, l'origina dei cometas se situariá dins un nívol orbitant au limit extèrne dau <a href="/wiki/Sist%C3%A8ma_Solar" title="Sistèma Solar">Sistèma Solar</a><sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup>. Pasmens, aquelei conjecturas aguèron pas d'impacte importanta sus la comunautat scientifica. </p><p>En 1950, un autre astronòm, lo <a href="/wiki/Pa%C3%AFses_Basses" title="Païses Basses">Neerlandés</a> <a href="/w/index.php?title=Jan_Oort&action=edit&redlink=1" class="new" title="Jan Oort (la pagina existís pas)">Jan Oort</a> (1900-1992), poguèt donc tornar prepausar l'idèa per explicar una contradiccion aparenta : lei <a href="/wiki/Cometa" title="Cometa">cometas</a> son destruchas après quauquei passatges a l'entorn dau <a href="/wiki/Soleu" title="Soleu">Soleu</a>. Òr, se totei lei cometas avián existit dempuei la formacion dau <a href="/wiki/Sist%C3%A8ma_Solar" title="Sistèma Solar">Sistèma Solar</a>, l'observacion d'una cometa seriá normalament venguda una causa impossibla<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup>. Per sostenir son ipotèsi, Oort seleccionèt 46 cometas observadas entre 1850 e 1952. La distribucion de l'invèrs dei <a href="/wiki/Semiaxe_major" title="Semiaxe major">semiaxes majors</a> de seis <a href="/wiki/Orbita" title="Orbita">orbitas</a> li permetèt de mòstrar l'existéncia possibla d'una sèrva situada entre 40 000 e 150 000 <a href="/wiki/Unitat_astronomica" title="Unitat astronomica">ua</a> (siá entre 0,6 e 2,4 <a href="/wiki/Annada_lutz" title="Annada lutz">ans lutz</a>). Segon eu, es compausat de miliards d'objèctes orbitant dins una zòna au limit de l'influéncia <a href="/wiki/Gravitat" title="Gravitat">gravitacionala</a> dau <a href="/wiki/Soleu" title="Soleu">Soleu</a>. De perturbacions exterioras, entraïnadas per lo passatge d'una <a href="/wiki/Estela" title="Estela">estela</a> a proximitat, podrián donc trebolar l'orbita d'aqueleis objèctes. Una partida seriá expulsada vèrs l'exterior e una partida vèrs l'interior, çò que mena a la formacion d'una cometa novèla. </p><p>Lo trabalh d'Oort recebèt un certan succès e la sèrva de cometas depintada dins sa publicacion es dicha « nívol d'Oort » ò « nívol d'Öpik-Oort » Es integrat dins la màger part dei descripcions dau <a href="/wiki/Sist%C3%A8ma_Solar" title="Sistèma Solar">Sistèma Solar</a>. Pasmens, en 2020, son existéncia es encara ipotetica. Lei possibilitats de la demostrar son limitadas car l'observacion dirècta d'objèctes astronomics sorns e pichons a una tala distància es fòrça complèxa. </p> <div class="mw-heading mw-heading2"><h2 id="Formacion_e_estructura">Formacion e estructura</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=N%C3%ADvol_d%27Oort&veaction=edit&section=2" title="Modificar la seccion : Formacion e estructura" class="mw-editsection-visualeditor"><span>modificar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=N%C3%ADvol_d%27Oort&action=edit&section=2" title="Edita el codi de la secció: Formacion e estructura"><span>Modificar lo còdi</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Formacion">Formacion</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=N%C3%ADvol_d%27Oort&veaction=edit&section=3" title="Modificar la seccion : Formacion" class="mw-editsection-visualeditor"><span>modificar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=N%C3%ADvol_d%27Oort&action=edit&section=3" title="Edita el codi de la secció: Formacion"><span>Modificar lo còdi</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Lo nívol d'Oort seriá un reliquat dau <a href="/w/index.php?title=Disc_protoplanetari&action=edit&redlink=1" class="new" title="Disc protoplanetari (la pagina existís pas)">disc protoplanetari</a> originau format a l'entorn dau <a href="/wiki/Soleu" title="Soleu">Soleu</a> après l'afondrament de la nebulosa solara i a 4,6 miliards d'ans. Segon lo scenari pus consensuau, leis objèctes dau nívol se serián formats per <a href="/wiki/Acrecion" title="Acrecion">acrecion</a> dins lei regions intèrnas dau <a href="/wiki/Sist%C3%A8ma_Solar" title="Sistèma Solar">Sistèma Solar</a>. Puei, foguèron expulsats vèrs lei regions extèrnes per d'interaccions gravitacionalas amb lei gigantas gasosas. Puei, leis interaccions amb d'autreis estelas e leis efiechs de marèia galactica aurián modificat leis <a href="/wiki/Orbita" title="Orbita">orbitas</a> per li rendre pus <a href="/wiki/Ceucle" class="mw-redirect" title="Ceucle">circularas</a>. </p> <div class="mw-heading mw-heading3"><h3 id="Estructura_e_composicion">Estructura e composicion</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=N%C3%ADvol_d%27Oort&veaction=edit&section=4" title="Modificar la seccion : Estructura e composicion" class="mw-editsection-visualeditor"><span>modificar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=N%C3%ADvol_d%27Oort&action=edit&section=4" title="Edita el codi de la secció: Estructura e composicion"><span>Modificar lo còdi</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Segon lei modèls actuaus, lo nívol d'Oort ocupariá una zòna situada entre lo limit extèrne de la <a href="/wiki/Cencha_de_Kuiper" title="Cencha de Kuiper">cencha de Kuiper</a> (vèrs 50 ua) e la periferia extèrna dau <a href="/wiki/Sist%C3%A8ma_Solar" title="Sistèma Solar">Sistèma Solar</a> (vèrs 150 000 ua). Seriá constituït de doas regions principalas : </p> <ul><li>lo nívol d'Oort intèrne (entre 100 e 20 000 ua) auriá una forma de <a href="/wiki/T%C3%B2r_(geometria)" title="Tòr (geometria)">tòr</a>. Es de còps dich <a href="/w/index.php?title=N%C3%ADvol_de_Hills&action=edit&redlink=1" class="new" title="Nívol de Hills (la pagina existís pas)">nívol de Hills</a> en onor de l'astronòm <a href="/wiki/USA" class="mw-redirect" title="USA">estatsunidenc</a> <a href="/w/index.php?title=Jack_Hills&action=edit&redlink=1" class="new" title="Jack Hills (la pagina existís pas)">Jack Hills</a> e de sei recèrcas sus aquela region dau <a href="/wiki/Sist%C3%A8ma_Solar" title="Sistèma Solar">Sistèma Solar</a>. Seriá a l'origina dei cometas periodicas dau tipe <a href="/wiki/Cometa_de_Halley" title="Cometa de Halley">Halley</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>.</li> <li>lo nívol d'Oort extèrne (entre 20 000 e 150 000 ua) auriá una forma d'<a href="/wiki/Esf%C3%A8ra" title="Esfèra">esfèra</a>. Leis objèctes d'aquela region serián feblament liats au <a href="/wiki/Soleu" title="Soleu">Soleu</a> e la zòna seriá la sèrva dei cometas de periòde lòng<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>.</li></ul> <p>Lo nombre d'objèctes contenguts dins lo nívol d'Oort es estimat a de miliers de miliards de nuclèus de cometas de mai de 1,3 km. Pasmens, lei distàncias entre elei serián fòrça importantas, de l'òrdre de plusors desenaus de milions de <a href="/wiki/Quilom%C3%A8tre" title="Quilomètre">quilomètres</a>. Sa <a href="/wiki/Massa" title="Massa">massa</a> totala es supausada inferiora a quauquei <a href="/wiki/Massa_terr%C3%A8stra" title="Massa terrèstra">massas terrèstras</a>. Durant lo sègle XX, èra estimada a 300 <a href="/wiki/Massa_terr%C3%A8stra" title="Massa terrèstra">massas terrèstras</a> mai aquela valor demeniguèt amb lo melhorament dei conoissenças sus la distribucion dei cometas de periòde lòng. La composicion deis objèctes presents dins lo nívol es supausada pròche d'aquela dei <a href="/wiki/Cometa" title="Cometa">cometas</a> (<a href="/wiki/R%C3%B2ca" title="Ròca">ròcas</a> e <a href="/wiki/Gla%C3%A7_(astronomia)" title="Glaç (astronomia)">glaç</a>). </p> <div class="mw-heading mw-heading2"><h2 id="Observacion_e_exploracion">Observacion e exploracion</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=N%C3%ADvol_d%27Oort&veaction=edit&section=5" title="Modificar la seccion : Observacion e exploracion" class="mw-editsection-visualeditor"><span>modificar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=N%C3%ADvol_d%27Oort&action=edit&section=5" title="Edita el codi de la secció: Observacion e exploracion"><span>Modificar lo còdi</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Quauquei <a href="/wiki/Cometa" title="Cometa">cometas</a> observadas durant lei sègles XX e XXI aurián una distància sufisenta per faire partida dau nívol d'Oort. D'efiech, se lei calculs son exacts, aquelei cometas an un <a href="/wiki/Af%C3%A8li" title="Afèli">afèli</a> fòrça alunchats dau <a href="/wiki/Soleu" title="Soleu">Soleu</a>. </p> <table class="wikitable centre" style="text-align:center"> <caption>Objèctes possibles dau nívol de Oort </caption> <tbody><tr> <th>Nom</th> <th>Diamètre<br />(km)</th> <th><a href="/wiki/Peri%C3%A8li" title="Perièli">Perièli</a><br />(ua)</th> <th><a href="/wiki/Af%C3%A8li" title="Afèli">Afèli</a><br />(<a href="/wiki/Unitat_astronomica" title="Unitat astronomica">ua</a>)</th> <th>Descubèrta </th></tr> <tr> <td align="left"><a href="/w/index.php?title=Cometa_West&action=edit&redlink=1" class="new" title="Cometa West (la pagina existís pas)">Cometa West</a></td> <td>?</td> <td>0,58</td> <td align="right">13 560</td> <td>1976 </td></tr> <tr> <td align="left"><a href="/w/index.php?title=Granda_cometa_de_genier_de_1910&action=edit&redlink=1" class="new" title="Granda cometa de genier de 1910 (la pagina existís pas)">Granda cometa de genier de 1910</a><sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup></td> <td>?</td> <td>0,13</td> <td align="right">51 590</td> <td>1910 </td></tr> <tr> <td align="left"><a href="/w/index.php?title=C/1992_J1_(Spacewatch)&action=edit&redlink=1" class="new" title="C/1992 J1 (Spacewatch) (la pagina existís pas)">C/1992 J1 (Spacewatch)</a></td> <td>?</td> <td>?</td> <td align="right">~154 200</td> <td>1992 </td></tr> <tr> <td align="left"><a href="/w/index.php?title=C/2014_S3_(PANSTARRS)&action=edit&redlink=1" class="new" title="C/2014 S3 (PANSTARRS) (la pagina existís pas)">C/2014 S3 (PANSTARRS)</a></td> <td>?</td> <td>?</td> <td>?</td> <td>2014 </td></tr></tbody></table> <p>En 2020, l'exploracion dau nívol de Oort es en delà dei capacitats <a href="/wiki/Tecnologia" title="Tecnologia">tecnologicas</a> umanas. Lei sondas dau <a href="/wiki/Programa_Voyager" title="Programa Voyager">programa Voyager</a> son encara dins la <a href="/wiki/Cencha_de_Kuiper" title="Cencha de Kuiper">cencha de Kuiper</a> e auràn agotat sei resèrvas d'<a href="/wiki/Energia" title="Energia">energia</a> avans d'arribar dins lei regions pus intèrnas dau nívol. Dins aquò, en 2014, un projècte foguèt anonciat dins lo quadre dau <a href="/w/index.php?title=Discovery_Program&action=edit&redlink=1" class="new" title="Discovery Program (la pagina existís pas)">Discovery Program</a> de la <a href="/wiki/NASA" class="mw-redirect" title="NASA">NASA</a>. Encara a l'estudi, es basat sus la mesa en plaça d'un telescòpi espaciau capable de detectar d'ocultacions d'<a href="/wiki/Estela" title="Estela">estelas</a> per d'objèctes de talha pichona situats a 10 000 ua de la <a href="/wiki/T%C3%A8rra" title="Tèrra">Tèrra</a>. Son objectiu premier seriá de detectar d'objèctes de la <a href="/wiki/Cencha_de_Kuiper" title="Cencha de Kuiper">cencha de Kuiper</a> mai l'observacion d'objèctes dei regions intèrnas dau nívol de Oort seriá en teoria possibla. </p> <div class="mw-heading mw-heading2"><h2 id="Annèxas"><span id="Ann.C3.A8xas"></span>Annèxas</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=N%C3%ADvol_d%27Oort&veaction=edit&section=6" title="Modificar la seccion : Annèxas" class="mw-editsection-visualeditor"><span>modificar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=N%C3%ADvol_d%27Oort&action=edit&section=6" title="Edita el codi de la secció: Annèxas"><span>Modificar lo còdi</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Liames_intèrnes"><span id="Liames_int.C3.A8rnes"></span>Liames intèrnes</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=N%C3%ADvol_d%27Oort&veaction=edit&section=7" title="Modificar la seccion : Liames intèrnes" class="mw-editsection-visualeditor"><span>modificar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=N%C3%ADvol_d%27Oort&action=edit&section=7" title="Edita el codi de la secció: Liames intèrnes"><span>Modificar lo còdi</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Cencha_de_Kuiper" title="Cencha de Kuiper">Cencha de Kuiper</a>.</li> <li><a href="/wiki/Cometa" title="Cometa">Cometa</a>.</li> <li><a href="/w/index.php?title=Mar%C3%A8ia_galactica&action=edit&redlink=1" class="new" title="Marèia galactica (la pagina existís pas)">Marèia galactica</a>.</li> <li><a href="/w/index.php?title=N%C3%ADvol_de_Mills&action=edit&redlink=1" class="new" title="Nívol de Mills (la pagina existís pas)">Nívol de Mills</a>.</li> <li><a href="/w/index.php?title=Jan_Oort&action=edit&redlink=1" class="new" title="Jan Oort (la pagina existís pas)">Jan Oort</a>.</li> <li><a href="/w/index.php?title=Ernst_%C3%96pik&action=edit&redlink=1" class="new" title="Ernst Öpik (la pagina existís pas)">Ernst Öpik</a>.</li> <li><a href="/wiki/Sist%C3%A8ma_Solar" title="Sistèma Solar">Sistèma Solar</a>.</li></ul> <div class="mw-heading mw-heading3"><h3 id="Bibliografia">Bibliografia</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=N%C3%ADvol_d%27Oort&veaction=edit&section=8" title="Modificar la seccion : Bibliografia" class="mw-editsection-visualeditor"><span>modificar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=N%C3%ADvol_d%27Oort&action=edit&section=8" title="Edita el codi de la secció: Bibliografia"><span>Modificar lo còdi</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Nòtas_e_referéncias"><span id="N.C3.B2tas_e_refer.C3.A9ncias"></span>Nòtas e referéncias</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=N%C3%ADvol_d%27Oort&veaction=edit&section=9" title="Modificar la seccion : Nòtas e referéncias" class="mw-editsection-visualeditor"><span>modificar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=N%C3%ADvol_d%27Oort&action=edit&section=9" title="Edita el codi de la secció: Nòtas e referéncias"><span>Modificar lo còdi</span></a><span class="mw-editsection-bracket">]</span></span></div> <ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><a href="#cite_ref-1">↑</a></span> <span class="reference-text"><i>« Avèm certanei rasons de pensar qu'existigue un nombre ben superior de cometas que, en causa de son alunchament a respècte dau Soleu, de lor escuritat e de lor abséncia de coa, pòdon escapar a nòstra observacion »</i>.</span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><a href="#cite_ref-2">↑</a></span> <span class="reference-text"><b><a href="/wiki/Angl%C3%A9s" title="Anglés">(en)</a></b> E. J. Öpik, « Note on Stellar Perturbations of Nearby Parabolic Orbits », <i>Proceedings of the American Academy of Arts and Sciences</i>, vol. 67,‎ 1932, pp. 169-182.</span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><a href="#cite_ref-3">↑</a></span> <span class="reference-text"><b><a href="/wiki/Angl%C3%A9s" title="Anglés">(en)</a></b> Jan H. Oort, « The structure of the cloud of comets surrounding the Solar System and a hypothesis concerning its origin », <i>Bulletin of the Astronomical Institutes of the Netherlands</i>, vol. 11,‎ 1950, pp. 91-110</span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><a href="#cite_ref-4">↑</a></span> <span class="reference-text"><b><a href="/wiki/Angl%C3%A9s" title="Anglés">(en)</a></b> H. F. Levison, L. Dones et M. J. Duncan, « The Origin of Halley-Type Comets: Probing the Inner Oort Cloud », <i>The Astronomical Journal</i>, vol. 121, n°4,‎ 2001, pp. 2253-2267.</span> </li> <li id="cite_note-5"><span class="mw-cite-backlink"><a href="#cite_ref-5">↑</a></span> <span class="reference-text">Lo rèsta dei cometas, dich cometas de periòde cort, vendriá de la <a href="/wiki/Cencha_de_Kuiper" title="Cencha de Kuiper">cencha de Kuiper</a>.</span> </li> <li id="cite_note-6"><span class="mw-cite-backlink"><a href="#cite_ref-6">↑</a></span> <span class="reference-text"><a rel="nofollow" class="external free" href="https://web.archive.org/web/20090810155521/http://www.meta-evolutions.de/pages/ssdc-oortsche-wolke.html">https://web.archive.org/web/20090810155521/http://www.meta-evolutions.de/pages/ssdc-oortsche-wolke.html</a></span> </li> </ol>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Recuperada de « <a dir="ltr" href="https://oc.wikipedia.org/w/index.php?title=Nívol_d%27Oort&oldid=2280987">https://oc.wikipedia.org/w/index.php?title=Nívol_d%27Oort&oldid=2280987</a> »</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Especial:Categorias" title="Especial:Categorias">Categorias de la pagina</a> : <ul><li><a href="/w/index.php?title=Categoria:P%C3%A0gines_amb_mides_d%27imatge_que_contenen_px_addicionals&action=edit&redlink=1" class="new" title="Categoria:Pàgines amb mides d'imatge que contenen px addicionals (la pagina existís pas)">Pàgines amb mides d'imatge que contenen px addicionals</a></li><li><a href="/wiki/Categoria:Article_redigit_en_proven%C3%A7au" title="Categoria:Article redigit en provençau">Article redigit en provençau</a></li><li><a href="/wiki/Categoria:Sist%C3%A8ma_Solar" title="Categoria:Sistèma Solar">Sistèma Solar</a></li></ul></div></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> <li id="footer-info-lastmod"> Aquela pagina es estada modificada pel darrièr còp lo 11 agost de 2021 a 01.21.</li> <li id="footer-info-copyright"><span style="white-space: normal"><a href="/wiki/Wikip%C3%A8dia:Drech_d%27autor" title="Wikipèdia:Drech d'autor">Drech d'autor</a> : Los tèxtes son disponibles jos <a rel="nofollow" class="external text" href="//creativecommons.org/licenses/by-sa/4.0/deed.fr">licéncia Creative Commons paternitat pertatge a l’identic</a> ; d’autras condicions se pòdon aplicar. 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