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data-event-name="pinnable-header.vector-toc.unpin">nascondi</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">Inizio</div> </a> </li> <li id="toc-Ipotesi" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Ipotesi"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Ipotesi</span> </div> </a> <ul id="toc-Ipotesi-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Composizione_e_struttura" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Composizione_e_struttura"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Composizione e struttura</span> </div> </a> <ul id="toc-Composizione_e_struttura-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Possibili_candidati_ad_appartenere_alla_nube_di_Oort" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Possibili_candidati_ad_appartenere_alla_nube_di_Oort"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Possibili candidati ad appartenere alla nube di Oort</span> </div> </a> <ul id="toc-Possibili_candidati_ad_appartenere_alla_nube_di_Oort-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Note" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Note"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Note</span> </div> </a> <ul id="toc-Note-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Bibliografia" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Bibliografia"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Bibliografia</span> </div> </a> <ul id="toc-Bibliografia-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Altri_progetti" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Altri_progetti"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Altri progetti</span> </div> </a> <ul id="toc-Altri_progetti-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Collegamenti_esterni" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Collegamenti_esterni"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>Collegamenti esterni</span> </div> </a> <ul id="toc-Collegamenti_esterni-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="Indice" 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="Mostra/Nascondi l'indice" > <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">Mostra/Nascondi l'indice</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 di 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="Vai a una voce in un'altra lingua. Disponibile in 95 lingue" > <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 lingue</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 - aragonese" lang="an" hreflang="an" data-title="Boira d'Oort" data-language-autonym="Aragonés" data-language-local-name="aragonese" 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 - arabo" lang="ar" hreflang="ar" data-title="سحابة أورط" data-language-autonym="العربية" data-language-local-name="arabo" 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 - arabo marocchino" lang="ary" hreflang="ary" data-title="غيامة د ؤرت" data-language-autonym="الدارجة" data-language-local-name="arabo marocchino" 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 - assamese" lang="as" hreflang="as" data-title="উৰ্ট মেঘ" data-language-autonym="অসমীয়া" data-language-local-name="assamese" 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 - asturiano" lang="ast" hreflang="ast" data-title="Nube d'Oort" data-language-autonym="Asturianu" data-language-local-name="asturiano" 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 - azerbaigiano" lang="az" hreflang="az" data-title="Oort buludu" data-language-autonym="Azərbaycanca" data-language-local-name="azerbaigiano" 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 - bavarese" lang="bar" hreflang="bar" data-title="Oortsche Woikn" data-language-autonym="Boarisch" data-language-local-name="bavarese" 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 - bielorusso" lang="be" hreflang="be" data-title="Воблака Оарта" data-language-autonym="Беларуская" data-language-local-name="bielorusso" 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 - bulgaro" lang="bg" hreflang="bg" data-title="Облак на Оорт" data-language-autonym="Български" data-language-local-name="bulgaro" 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 - bengalese" lang="bn" hreflang="bn" data-title="উর্ট মেঘ" data-language-autonym="বাংলা" data-language-local-name="bengalese" 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 - bretone" lang="br" hreflang="br" data-title="Koumoulennad Oort" data-language-autonym="Brezhoneg" data-language-local-name="bretone" 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 - bosniaco" lang="bs" hreflang="bs" data-title="Oortov oblak" data-language-autonym="Bosanski" data-language-local-name="bosniaco" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-ca badge-Q17437796 badge-featuredarticle mw-list-item" title="voce in vetrina"><a href="https://ca.wikipedia.org/wiki/N%C3%BAvol_d%27Oort" title="Núvol d'Oort - catalano" lang="ca" hreflang="ca" data-title="Núvol d'Oort" data-language-autonym="Català" data-language-local-name="catalano" 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 - ceco" lang="cs" hreflang="cs" data-title="Oortův oblak" data-language-autonym="Čeština" data-language-local-name="ceco" 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 - gallese" lang="cy" hreflang="cy" data-title="Cwmwl Oort" data-language-autonym="Cymraeg" data-language-local-name="gallese" 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 - danese" lang="da" hreflang="da" data-title="Oortskyen" data-language-autonym="Dansk" data-language-local-name="danese" 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 - tedesco" lang="de" hreflang="de" data-title="Oortsche Wolke" data-language-autonym="Deutsch" data-language-local-name="tedesco" 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 - greco" lang="el" hreflang="el" data-title="Νέφος του Όορτ" data-language-autonym="Ελληνικά" data-language-local-name="greco" 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="voce in vetrina"><a href="https://en.wikipedia.org/wiki/Oort_cloud" title="Oort cloud - inglese" lang="en" hreflang="en" data-title="Oort cloud" data-language-autonym="English" data-language-local-name="inglese" 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="voce in vetrina"><a href="https://es.wikipedia.org/wiki/Nube_de_Oort" title="Nube de Oort - spagnolo" lang="es" hreflang="es" data-title="Nube de Oort" data-language-autonym="Español" data-language-local-name="spagnolo" 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 - estone" lang="et" hreflang="et" data-title="Öpiku-Oorti pilv" data-language-autonym="Eesti" data-language-local-name="estone" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-eu badge-Q17437796 badge-featuredarticle mw-list-item" title="voce in vetrina"><a href="https://eu.wikipedia.org/wiki/Oorten_hodeia" title="Oorten hodeia - basco" lang="eu" hreflang="eu" data-title="Oorten hodeia" data-language-autonym="Euskara" data-language-local-name="basco" 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 - persiano" lang="fa" hreflang="fa" data-title="ابر اورت" data-language-autonym="فارسی" data-language-local-name="persiano" 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 - finlandese" lang="fi" hreflang="fi" data-title="Oortin pilvi" data-language-autonym="Suomi" data-language-local-name="finlandese" 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 - francese" lang="fr" hreflang="fr" data-title="Nuage de Oort" data-language-autonym="Français" data-language-local-name="francese" 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 - irlandese" lang="ga" hreflang="ga" data-title="Scamall Oort" data-language-autonym="Gaeilge" data-language-local-name="irlandese" 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 - gaelico scozzese" lang="gd" hreflang="gd" data-title="Neul Oort" data-language-autonym="Gàidhlig" data-language-local-name="gaelico scozzese" class="interlanguage-link-target"><span>Gàidhlig</span></a></li><li class="interlanguage-link interwiki-gl badge-Q17437796 badge-featuredarticle mw-list-item" title="voce in vetrina"><a href="https://gl.wikipedia.org/wiki/Nube_de_Oort" title="Nube de Oort - galiziano" lang="gl" hreflang="gl" data-title="Nube de Oort" data-language-autonym="Galego" data-language-local-name="galiziano" 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 - ebraico" lang="he" hreflang="he" data-title="עננת אורט" data-language-autonym="עברית" data-language-local-name="ebraico" 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 - croato" lang="hr" hreflang="hr" data-title="Oortov oblak" data-language-autonym="Hrvatski" data-language-local-name="croato" 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 - ungherese" lang="hu" hreflang="hu" data-title="Oort-felhő" data-language-autonym="Magyar" data-language-local-name="ungherese" 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 - armeno" lang="hy" hreflang="hy" data-title="Օորտի ամպ" data-language-autonym="Հայերեն" data-language-local-name="armeno" 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 - indonesiano" lang="id" hreflang="id" data-title="Awan Oort" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonesiano" 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 - islandese" lang="is" hreflang="is" data-title="Oortský" data-language-autonym="Íslenska" data-language-local-name="islandese" class="interlanguage-link-target"><span>Íslenska</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 - giapponese" lang="ja" hreflang="ja" data-title="オールトの雲" data-language-autonym="日本語" data-language-local-name="giapponese" 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 - giavanese" lang="jv" hreflang="jv" data-title="Méga Oort" data-language-autonym="Jawa" data-language-local-name="giavanese" 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 - georgiano" lang="ka" hreflang="ka" data-title="ოორტის ღრუბელი" data-language-autonym="ქართული" data-language-local-name="georgiano" 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 - coreano" lang="ko" hreflang="ko" data-title="오르트 구름" data-language-autonym="한국어" data-language-local-name="coreano" 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 - coloniese" lang="ksh" hreflang="ksh" data-title="Oortsche Wolke" data-language-autonym="Ripoarisch" data-language-local-name="coloniese" 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 - latino" lang="la" hreflang="la" data-title="Nubes Oort" data-language-autonym="Latina" data-language-local-name="latino" 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 - lussemburghese" lang="lb" hreflang="lb" data-title="Oort-Wollek" data-language-autonym="Lëtzebuergesch" data-language-local-name="lussemburghese" 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 - limburghese" lang="li" hreflang="li" data-title="Oortwolk" data-language-autonym="Limburgs" data-language-local-name="limburghese" 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 - lombardo" lang="lmo" hreflang="lmo" data-title="Nigol de Oort" data-language-autonym="Lombard" data-language-local-name="lombardo" 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 - lituano" lang="lt" hreflang="lt" data-title="Orto kometoidų debesis" data-language-autonym="Lietuvių" data-language-local-name="lituano" 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 - lettone" lang="lv" hreflang="lv" data-title="Orta mākonis" data-language-autonym="Latviešu" data-language-local-name="lettone" 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 - macedone" lang="mk" hreflang="mk" data-title="Ортов Облак" data-language-autonym="Македонски" data-language-local-name="macedone" 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 - malese" lang="ms" hreflang="ms" data-title="Awan Oort" data-language-autonym="Bahasa Melayu" data-language-local-name="malese" 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 - maltese" lang="mt" hreflang="mt" data-title="Sħaba ta' Oort" data-language-autonym="Malti" data-language-local-name="maltese" 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 - birmano" lang="my" hreflang="my" data-title="အောတိမ်တိုက်" data-language-autonym="မြန်မာဘာသာ" data-language-local-name="birmano" 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 - basso tedesco" lang="nds" hreflang="nds" data-title="Oortsche Wulk" data-language-autonym="Plattdüütsch" data-language-local-name="basso tedesco" 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 - olandese" lang="nl" hreflang="nl" data-title="Oortwolk" data-language-autonym="Nederlands" data-language-local-name="olandese" 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 - norvegese nynorsk" lang="nn" hreflang="nn" data-title="Oortskya" data-language-autonym="Norsk nynorsk" data-language-local-name="norvegese 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 - norvegese bokmål" lang="nb" hreflang="nb" data-title="Oorts sky" data-language-autonym="Norsk bokmål" data-language-local-name="norvegese 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 - occitano" lang="oc" hreflang="oc" data-title="Nívol d'Oort" data-language-autonym="Occitan" data-language-local-name="occitano" class="interlanguage-link-target"><span>Occitan</span></a></li><li class="interlanguage-link interwiki-pl badge-Q17437796 badge-featuredarticle mw-list-item" title="voce in vetrina"><a href="https://pl.wikipedia.org/wiki/Ob%C5%82ok_Oorta" title="Obłok Oorta - polacco" lang="pl" hreflang="pl" data-title="Obłok Oorta" data-language-autonym="Polski" data-language-local-name="polacco" 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="voce in vetrina"><a href="https://pt.wikipedia.org/wiki/Nuvem_de_Oort" title="Nuvem de Oort - portoghese" lang="pt" hreflang="pt" data-title="Nuvem de Oort" data-language-autonym="Português" data-language-local-name="portoghese" 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 - rumeno" lang="ro" hreflang="ro" data-title="Norul lui Oort" data-language-autonym="Română" data-language-local-name="rumeno" 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 - russo" lang="ru" hreflang="ru" data-title="Облако Оорта" data-language-autonym="Русский" data-language-local-name="russo" 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 - siciliano" lang="scn" hreflang="scn" data-title="Nubbi di Oort" data-language-autonym="Sicilianu" data-language-local-name="siciliano" 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 - scozzese" lang="sco" hreflang="sco" data-title="Oort clood" data-language-autonym="Scots" data-language-local-name="scozzese" 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-croato" lang="sh" hreflang="sh" data-title="Oortov oblak" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="serbo-croato" 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 - slovacco" lang="sk" hreflang="sk" data-title="Oortov mrak komét" data-language-autonym="Slovenčina" data-language-local-name="slovacco" 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 - sloveno" lang="sl" hreflang="sl" data-title="Oortov oblak" data-language-autonym="Slovenščina" data-language-local-name="sloveno" 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 - serbo" lang="sr" hreflang="sr" data-title="Ортов облак" data-language-autonym="Српски / srpski" data-language-local-name="serbo" 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 - svedese" lang="sv" hreflang="sv" data-title="Oorts kometmoln" data-language-autonym="Svenska" data-language-local-name="svedese" 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 - 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 - tagico" lang="tg" hreflang="tg" data-title="Абри оорт" data-language-autonym="Тоҷикӣ" data-language-local-name="tagico" 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 - thailandese" lang="th" hreflang="th" data-title="เมฆออร์ต" data-language-autonym="ไทย" data-language-local-name="thailandese" 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 - turco" lang="tr" hreflang="tr" data-title="Oort bulutu" data-language-autonym="Türkçe" data-language-local-name="turco" 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 - tataro" lang="tt" hreflang="tt" data-title="Оорт болыты" data-language-autonym="Татарча / tatarça" data-language-local-name="tataro" 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 - ucraino" lang="uk" hreflang="uk" data-title="Хмара Оорта" data-language-autonym="Українська" data-language-local-name="ucraino" 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 - uzbeco" lang="uz" hreflang="uz" data-title="Oort buluti" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="uzbeco" 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 - veneto" lang="vec" hreflang="vec" data-title="Nube de Oort" data-language-autonym="Vèneto" data-language-local-name="veneto" 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 - vietnamita" lang="vi" hreflang="vi" data-title="Đám mây Oort" data-language-autonym="Tiếng Việt" data-language-local-name="vietnamita" 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 - wu" lang="wuu" hreflang="wuu" data-title="奥尔特云" data-language-autonym="吴语" data-language-local-name="wu" class="interlanguage-link-target"><span>吴语</span></a></li><li class="interlanguage-link interwiki-xmf 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Wikipedia, l'enciclopedia libera.</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="it" dir="ltr"><figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Kuiper_belt_-_Oort_cloud-it.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a1/Kuiper_belt_-_Oort_cloud-it.svg/290px-Kuiper_belt_-_Oort_cloud-it.svg.png" decoding="async" width="290" height="249" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a1/Kuiper_belt_-_Oort_cloud-it.svg/435px-Kuiper_belt_-_Oort_cloud-it.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a1/Kuiper_belt_-_Oort_cloud-it.svg/580px-Kuiper_belt_-_Oort_cloud-it.svg.png 2x" data-file-width="512" data-file-height="439" /></a><figcaption>Rappresentazione artistica della Fascia di Kuiper (sopra) e della nube di Oort (sotto)</figcaption></figure> <table border="0" cellpadding="2" cellspacing="0" align="right" class="noprint toccolours" style="margin-left: 1em; margin-bottom: 1em; clear: both"> <tbody><tr> <th style="background:#ccccff" align="center"><b>Oggetti cis- e trans-nettuniani</b> </th></tr> <tr> <td align="left"> <ul><li><a href="/wiki/Nettuno_(astronomia)" title="Nettuno (astronomia)">Oggetti cisnettuniani</a> <ul><li><div style="font-size: 95%;"><a href="/wiki/Centauro_(astronomia)" title="Centauro (astronomia)">Asteroidi centauri</a> · <small><a href="/wiki/Categoria:Asteroidi_centauri" title="Categoria:Asteroidi centauri">categoria</a></small></div></li> <li><div style="font-size: 95%;"><a href="/wiki/Asteroidi_troiani_di_Nettuno" title="Asteroidi troiani di Nettuno">Asteroidi troiani di Nettuno</a> · <small><a href="/wiki/Categoria:Asteroidi_troiani_di_Nettuno" title="Categoria:Asteroidi troiani di Nettuno">categoria</a></small></div></li></ul></li> <li><a href="/wiki/Oggetto_transnettuniano" title="Oggetto transnettuniano">Oggetti transnettuniani</a> <i>(TNO)</i> · <small><a href="/wiki/Categoria:Oggetti_transnettuniani" title="Categoria:Oggetti transnettuniani">categoria</a></small> <ul><li><div style="font-size: 95%;"><a href="/wiki/Fascia_di_Kuiper" title="Fascia di Kuiper">Fascia di Kuiper</a> <i>(KBO)</i></div> <ul><li><div style="font-size: 95%;"><a href="/wiki/Cubewano" title="Cubewano">KBO classici</a> (cubewani) · <small><a href="/wiki/Categoria:Cubewani" title="Categoria:Cubewani">categoria</a></small></div></li> <li><div style="font-size: 95%;"><a href="/wiki/Oggetto_transnettuniano_risonante" title="Oggetto transnettuniano risonante">KBO risonanti</a> · <small><a href="/wiki/Categoria:Oggetti_transnettuniani" title="Categoria:Oggetti transnettuniani">categoria</a></small></div> <ul><li><div style="font-size: 95%;"><a href="/wiki/Plutino" title="Plutino">Plutini</a> (risonanza 2:3) · <small><a href="/wiki/Categoria:Plutini" title="Categoria:Plutini">categoria</a></small></div></li> <li><div style="font-size: 95%;"><a href="/wiki/Twotino" title="Twotino">Twotini</a> (risonanza 1:2)</div></li></ul></li></ul></li> <li><div style="font-size: 95%;"><a href="/wiki/Disco_diffuso" title="Disco diffuso">Disco diffuso</a> <i>(SDO)</i> · <small><a href="/wiki/Categoria:Oggetti_del_disco_diffuso" title="Categoria:Oggetti del disco diffuso">categoria</a></small></div> <ul><li><div style="font-size: 95%;"><a href="/wiki/Oggetto_transnettuniano_risonante" title="Oggetto transnettuniano risonante">SDO risonanti</a></div></li></ul></li> <li><div style="font-size: 95%;"><a class="mw-selflink selflink">Nube di Oort</a> <i>(OCO)</i></div></li></ul></li></ul> <hr /> <div align="center"><div style="font-size: 82%;">I <a href="/wiki/Pianeta_nano" title="Pianeta nano">pianeti nani</a> transnettuniani sono classificati come <a href="/wiki/Plutoide" title="Plutoide">plutoidi</a></div></div> </td></tr></tbody></table> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Oort_cloud_Sedna_orbit.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/1/12/Oort_cloud_Sedna_orbit.jpg/240px-Oort_cloud_Sedna_orbit.jpg" decoding="async" width="240" height="240" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/1/12/Oort_cloud_Sedna_orbit.jpg/360px-Oort_cloud_Sedna_orbit.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/1/12/Oort_cloud_Sedna_orbit.jpg/480px-Oort_cloud_Sedna_orbit.jpg 2x" data-file-width="2499" data-file-height="2499" /></a><figcaption>L'immagine mostra le distanze delle orbite di diversi oggetti nel sistema solare, da in alto a sinistra e in senso orario: i pianeti interni, i pianeti esterni, l'orbita di <a href="/wiki/Sedna_(astronomia)" class="mw-redirect" title="Sedna (astronomia)">Sedna</a> e la <b>nube di Oort</b></figcaption></figure> <p>La <b>nube di Oort</b> è una nube sferica<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> di <a href="/wiki/Cometa" title="Cometa">comete</a> posta tra 20 000 e <span class="nowrap"><span data-sort-value="7016149597870700000♠"></span>100<span style="margin-left:.25em;">000</span> <a href="/wiki/Unit%C3%A0_astronomica" title="Unità astronomica">au</a></span> o 0,3 e <span class="nowrap"><span data-sort-value="7016141910957088712♠"></span>1,5 <a href="/wiki/Anno_luce" title="Anno luce">al</a></span> dal <a href="/wiki/Sole" title="Sole">Sole</a>, cioè circa 2 400 volte la distanza media tra il Sole e <a href="/wiki/Plutone_(astronomia)" title="Plutone (astronomia)">Plutone</a>. </p><p>Questa nube non è mai stata osservata perché troppo lontana e buia perfino per i <a href="/wiki/Telescopio" title="Telescopio">telescopi</a> odierni, ma si ritiene che sia il luogo da cui provengano le comete di lungo periodo (come la <a href="/wiki/Cometa_Hale-Bopp" title="Cometa Hale-Bopp">Hale-Bopp</a> e la <a href="/wiki/Cometa_Hyakutake" title="Cometa Hyakutake">Hyakutake</a>, avvistate alla fine del <a href="/wiki/XX_secolo" title="XX secolo">XX secolo</a>) che attraversano la parte interna del <a href="/wiki/Sistema_solare" title="Sistema solare">sistema solare</a>. Nel <a href="/wiki/1932" title="1932">1932</a>, l'<a href="/wiki/Astronomo" title="Astronomo">astronomo</a> <a href="/wiki/Estonia" title="Estonia">estone</a> <a href="/wiki/Ernst_%C3%96pik" title="Ernst Öpik">Ernst Öpik</a> ipotizzò che le comete avessero origine da una nube situata al bordo esterno del sistema Solare. </p><p>Nel <a href="/wiki/1950" title="1950">1950</a>, l'idea fu ripresa dall'astronomo <a href="/wiki/Paesi_Bassi" title="Paesi Bassi">olandese</a> <a href="/wiki/Jan_Oort" title="Jan Oort">Jan Oort</a> per spiegare un'apparente contraddizione: le comete vengono periodicamente distrutte dopo numerosi passaggi nel sistema solare interno: perciò, se le comete si fossero originate all'inizio del sistema, oggi sarebbero tutte distrutte. Il fatto che le si possa ancora osservare implica che abbiano un'origine diversa. Secondo la teoria, la nube di Oort conterrebbe milioni di nuclei di comete, che sarebbero stabili perché la <a href="/wiki/Radiazione_solare" title="Radiazione solare">radiazione solare</a> è troppo debole per avere un effetto a quelle distanze.<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> La nube fornirebbe una provvista continua di nuove comete, che rimpiazzerebbero quelle distrutte. La teoria sembrerebbe essere confermata dalle osservazioni successive, che ci mostrano come le comete provengano da ogni direzione, con simmetria sferica. </p><p>La nube di Oort sarebbe un residuo della <a href="/wiki/Nebulosa" title="Nebulosa">nebulosa</a> originale da cui si formarono il Sole e i pianeti cinque miliardi di anni fa e sarebbe debolmente legata al sistema solare.<sup id="cite_ref-Morbidelli2005_3-0" class="reference"><a href="#cite_note-Morbidelli2005-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> Si pensa che anche le altre <a href="/wiki/Stella" title="Stella">stelle</a> abbiano una nube di Oort e che i bordi esterni delle nubi di due stelle vicine possano a volte sovrapporsi, causando un'occasionale "intrusione" cometaria.<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> </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Ipotesi">Ipotesi</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Nube_di_Oort&veaction=edit&section=1" title="Modifica la sezione Ipotesi" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Nube_di_Oort&action=edit&section=1" title="Edit section's source code: Ipotesi"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Nel 1932 <a href="/wiki/Ernst_%C3%96pik" title="Ernst Öpik">Ernst Öpik</a> ipotizzò che le <a href="/wiki/Comete" class="mw-redirect" title="Comete">comete</a> di lungo periodo potessero originarsi in una nube di corpi celesti posizionata al confine estremo del <a href="/wiki/Sistema_Solare" class="mw-redirect" title="Sistema Solare">Sistema Solare</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><p>Nel 1950, l'idea venne ripresa dall'astronomo olandese <a href="/wiki/Jan_Oort" title="Jan Oort">Jan Oort</a>, che si proponeva di risolvere uno dei più interessanti paradossi astronomici.<sup id="cite_ref-Oort_6-0" class="reference"><a href="#cite_note-Oort-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> L'orbita delle comete è molto instabile, essendo la <a href="/wiki/Dinamica_(fisica)" class="mw-redirect" title="Dinamica (fisica)">dinamica</a> ciò che determina se esse sono destinate a collidere con il <a href="/wiki/Sole" title="Sole">Sole</a> o con qualche altro pianeta, o se, viceversa, sono destinate a essere espulse a causa della <a href="/wiki/Perturbazione_(astronomia)" title="Perturbazione (astronomia)">perturbazione</a> dei corpi celesti del sistema solare. Inoltre, il ghiaccio e gli altri elementi piuttosto volatili di cui sono composte le comete consentono la dispersione graduale a causa della <a href="/wiki/Radiazione_elettromagnetica" title="Radiazione elettromagnetica">radiazione elettromagnetica</a>, sino a raggiungere il punto in cui la cometa si divide e si assottiglia fino a uno strato di crosta isolante che rallenta la perdita di ulteriori gas. A seguito di ciò, Oort capì che le comete non potevano essersi formate nella loro orbita attuale e che perciò dovevano essersi trattenute in una lontana regione spaziale, un deposito, per la maggior parte della loro esistenza.<sup id="cite_ref-Oort_6-1" class="reference"><a href="#cite_note-Oort-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-dave_7-0" class="reference"><a href="#cite_note-dave-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-book_8-0" class="reference"><a href="#cite_note-book-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> </p><p>Esistono due principali classi di cometa: le comete di corto periodo, che presentano orbite inferiori a <span class="nowrap"><span data-sort-value="7012149597870700000♠"></span>10 <a href="/wiki/Unit%C3%A0_astronomica" title="Unità astronomica">au</a></span>, e le comete di lungo periodo, che mostrano orbite maggiori a <span class="nowrap"><span data-sort-value="7014149597870700000♠"></span>1<span style="margin-left:.25em;">000</span> au</span>. </p><p>Oort analizzò queste ultime e riscontrò che la maggior parte possedeva un <a href="/wiki/Afelio" title="Afelio">afelio</a>, la distanza maggiore dal Sole, di circa <span class="nowrap"><span data-sort-value="7015299195741400000♠"></span>20<span style="margin-left:.25em;">000</span> au</span> e sembrava provenire da tutte le direzioni; ciò rafforzava la sua ipotesi e suggeriva un deposito di forma sferica. Le poche comete che possedevano un afelio di <span class="nowrap"><span data-sort-value="7015149597870700000♠"></span>10<span style="margin-left:.25em;">000</span> <a href="/wiki/Unit%C3%A0_astronomica" title="Unità astronomica">au</a></span> dovevano essere passate attraverso il <a href="/wiki/Sistema_solare" title="Sistema solare">Sistema solare</a> e dovevano aver avuto le loro orbite modificate verso l'interno dalla forza di gravità generata dai pianeti. </p> <div class="mw-heading mw-heading2"><h2 id="Composizione_e_struttura">Composizione e struttura</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Nube_di_Oort&veaction=edit&section=2" title="Modifica la sezione Composizione e struttura" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Nube_di_Oort&action=edit&section=2" title="Edit section's source code: Composizione e struttura"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Si pensa che la nube di Oort si estenda tra 2 000 e <span class="nowrap"><span data-sort-value="7014747989353500000♠"></span>5<span style="margin-left:.25em;">000</span> <a href="/wiki/Unit%C3%A0_astronomica" title="Unità astronomica">au</a></span> fino ad arrivare a <span class="nowrap"><span data-sort-value="7015747989353500000♠"></span>50<span style="margin-left:.25em;">000</span> au</span> dal Sole.<sup id="cite_ref-book_8-1" class="reference"><a href="#cite_note-book-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> Altre stime collocano il confine della nube di Oort tra 100 000 e <span class="nowrap"><span data-sort-value="7016299195741400000♠"></span>200<span style="margin-left:.25em;">000</span> au</span>.<sup id="cite_ref-book_8-2" class="reference"><a href="#cite_note-book-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> </p><p>È possibile suddividere la nube di Oort in due regioni: la nube di Oort esterna <span class="nowrap">(20 000 - <span class="nowrap"><span data-sort-value="7015747989353500000♠"></span>50<span style="margin-left:.25em;">000</span> au</span>),</span> di forma sferica e la nube di Oort interna <span class="nowrap">(2 000 - <span class="nowrap"><span data-sort-value="7015299195741400000♠"></span>20<span style="margin-left:.25em;">000</span> au</span>)</span> di forma <a href="/wiki/Toro_(geometria)" title="Toro (geometria)">toroidale</a>. </p><p>La parte esterna della nube è molto poco legata al Sole, ed è la fonte della maggior parte delle comete di lungo periodo. La nube interna è conosciuta anche come <a href="/w/index.php?title=Nube_di_Hills&action=edit&redlink=1" class="new" title="Nube di Hills (la pagina non esiste)">nube di Hills</a>, in onore dell'astronomo <a href="/w/index.php?title=J._G._Hills&action=edit&redlink=1" class="new" title="J. G. Hills (la pagina non esiste)">J. G. Hills</a>, che suppose la sua esistenza nel <a href="/wiki/1981" title="1981">1981</a>.<sup id="cite_ref-Hills1981_9-0" class="reference"><a href="#cite_note-Hills1981-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> I modelli ipotizzano che la nube possieda al suo interno decine o centinaia di volte le comete presenti nella nube esteriore.<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><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-Donahue1991_12-0" class="reference"><a href="#cite_note-Donahue1991-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> Sembra che la nube di Hills sia fonte di comete per la nube esterna, più tenue, nella misura in cui quelle posizionate in questa zona si esauriscono. La <a href="/w/index.php?title=Nube_di_Hills&action=edit&redlink=1" class="new" title="Nube di Hills (la pagina non esiste)">nube di Hills</a> spiega perciò l'esistenza della nube di Oort dopo miliardi di anni dalla sua nascita.<sup id="cite_ref-Julio1997_13-0" class="reference"><a href="#cite_note-Julio1997-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup> Si pensa che la nube di Oort possa contenere comete anche di 1,3 chilometri di diametro e cinquecentomila milioni con una <a href="/wiki/Magnitudine_assoluta" title="Magnitudine assoluta">magnitudine assoluta</a> minore di +10,9 (più è basso il valore, maggiore è la luminosità). Nonostante l'altissima densità di comete, ciascuna di esse è separata dall'altra in media da decine di milioni di chilometri. Non si conosce con certezza la massa della nube di Oort, ma se si prende la <a href="/wiki/Cometa_di_Halley" title="Cometa di Halley">Cometa di Halley</a> come prototipo di cometa della nube esteriore, si stima che la massa sia circa di <span class="nowrap"><span data-sort-value="7025300000000000000♠"></span>3<span style="margin-left:0.25em;margin-right:0.15em;">×</span>10<sup>25</sup> <a href="/wiki/Chilogrammo" title="Chilogrammo">kg</a></span>, circa cinque volte la <a href="/wiki/Massa_terrestre" title="Massa terrestre">massa della Terra</a>.<sup id="cite_ref-Weissman1983_14-0" class="reference"><a href="#cite_note-Weissman1983-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Possibili_candidati_ad_appartenere_alla_nube_di_Oort">Possibili candidati ad appartenere alla nube di Oort</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Nube_di_Oort&veaction=edit&section=3" title="Modifica la sezione Possibili candidati ad appartenere alla nube di Oort" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Nube_di_Oort&action=edit&section=3" title="Edit section's source code: Possibili candidati ad appartenere alla nube di Oort"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Vi sono varie ipotesi od osservazioni relativi a <a href="/wiki/Oggetto_transnettuniano" title="Oggetto transnettuniano">oggetti transnettuniani</a> di grandi dimensioni che orbitano attorno al <a href="/wiki/Sole" title="Sole">Sole</a> su di un'<a href="/wiki/Orbita" title="Orbita">orbita</a> particolarmente eccentrica e che siano parte della nube di Oort. </p><p><a href="/wiki/90377_Sedna" title="90377 Sedna">90377 Sedna</a> è un <a href="/wiki/Oggetto_transnettuniano" title="Oggetto transnettuniano">oggetto transnettuniano</a> di dimensioni approssimativamente pari ai due terzi di quelle di <a href="/wiki/Plutone_(astronomia)" title="Plutone (astronomia)">Plutone</a>. Gli scopritori sostengono che Sedna sia il primo corpo della nube di Oort a essere osservato, affermando che è troppo lontano dal <a href="/wiki/Sole" title="Sole">Sole</a> per essere considerato un oggetto della <a href="/wiki/Fascia_di_Kuiper" title="Fascia di Kuiper">fascia di Kuiper</a>. Tuttavia è assai più vicino al Sole di quanto ci si attenderebbe da un oggetto della nube di Oort, soprattutto nei pressi del perielio, e la sua <a href="/wiki/Inclinazione_orbitale" title="Inclinazione orbitale">inclinazione orbitale</a> non si discosta eccessivamente dall'<a href="/wiki/Eclittica" title="Eclittica">eclittica</a>. Sedna appartiene piuttosto alla nube di Oort interna, una regione relativamente poco spessa situata sul piano dell'eclittica ed estesa dalla <a href="/wiki/Fascia_di_Kuiper" title="Fascia di Kuiper">fascia di Kuiper</a> sino alla nube esteriore. </p><p><a href="/wiki/2012_VP113" title="2012 VP113">2012 VP113</a> è un planetoide avente magnitudine assoluta di 4,1, forse classificabile come <a href="/wiki/Pianeta_nano" title="Pianeta nano">pianeta nano</a> e che ha il più grande perielio conosciuto per un oggetto del <a href="/wiki/Sistema_solare" title="Sistema solare">sistema solare</a><sup id="cite_ref-jpl-search_15-0" class="reference"><a href="#cite_note-jpl-search-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup>. L'ultimo passaggio al perielio è avvenuto attorno al <a href="/wiki/1979" title="1979">1979</a>, a una distanza di 80 AU<sup id="cite_ref-jpldata_16-0" class="reference"><a href="#cite_note-jpldata-16"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup> e al momento della scoperta era a 83 AU dal Sole. Sono noti solo altri quattro oggetti del sistema solare aventi perieli superiori a 47 UA: 90377 Sedna (76 UA), <a href="/wiki/2004_XR190" class="mw-redirect" title="2004 XR190">2004 XR190</a> (51 UA), <a href="/w/index.php?title=2010_GB174&action=edit&redlink=1" class="new" title="2010 GB174 (la pagina non esiste)">2010 GB174</a> (48 UA) e <a href="/w/index.php?title=2004_VN112&action=edit&redlink=1" class="new" title="2004 VN112 (la pagina non esiste)">2004 VN112</a> (47 UA)<sup id="cite_ref-jpl-search_15-1" class="reference"><a href="#cite_note-jpl-search-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup>. La scarsità di corpi celesti con perieli compresi fra 50 e 75 UA non sembra essere un artefatto legato alle osservazioni<sup id="cite_ref-nature_letter_17-0" class="reference"><a href="#cite_note-nature_letter-17"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup>. </p><p>Di contro, <a href="/wiki/Tyche_(astronomia)" title="Tyche (astronomia)">Tyche</a> è il nome dato a un ipotetico pianeta <a href="/wiki/Gigante_gassoso" title="Gigante gassoso">gigante gassoso</a> situato nella nube di Oort, proposto per la prima volta nel <a href="/wiki/1999" title="1999">1999</a> dall'astronomo <a href="/w/index.php?title=John_Matese&action=edit&redlink=1" class="new" title="John Matese (la pagina non esiste)">John Matese</a> dell'<a href="/wiki/Universit%C3%A0_della_Louisiana" class="mw-redirect" title="Università della Louisiana">Università della Louisiana</a><sup id="cite_ref-Live_18-0" class="reference"><a href="#cite_note-Live-18"><span class="cite-bracket">[</span>18<span class="cite-bracket">]</span></a></sup>. L'esistenza di Tyche può essere ipotizzata dallo studio dei punti d'origine delle <a href="/wiki/Cometa" title="Cometa">comete a lungo periodo</a>. Molti astronomi hanno espresso scetticismo circa l'esistenza di questo oggetto<sup id="cite_ref-Live_18-1" class="reference"><a href="#cite_note-Live-18"><span class="cite-bracket">[</span>18<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-19" class="reference"><a href="#cite_note-19"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup>. L'analisi condotta sui dati del telescopio spaziale <a href="/wiki/Wide-field_Infrared_Survey_Explorer" title="Wide-field Infrared Survey Explorer">WISE</a> ha escluso l'esistenza di tale pianeta<sup id="cite_ref-20" class="reference"><a href="#cite_note-20"><span class="cite-bracket">[</span>20<span class="cite-bracket">]</span></a></sup>. </p> <table class="wikitable" border="2" cellspacing="0" cellpadding="3" style="margin: 1em 1em 1em 0; border: 1px solid #AAA; border-collapse: collapse; font-size: 0.95em;"> <tbody><tr> <th>Numero </th> <th>Nome </th> <th>Diametro<br />equatoriale<br />(<a href="/wiki/Chilometro" title="Chilometro">km</a>) </th> <th><a href="/wiki/Perielio" title="Perielio">Perielio</a> (<a href="/wiki/Unit%C3%A0_astronomica" title="Unità astronomica">UA</a>) </th> <th><a href="/wiki/Afelio" title="Afelio">Afelio</a> (<a href="/wiki/Unit%C3%A0_astronomica" title="Unità astronomica">UA</a>) </th> <th>Data<br />della<br />scoperta </th> <th>Scopritore </th> <th>Metodo usato<br />per la misura<br />del diametro </th></tr> <tr> <td>90377 </td> <td><a href="/wiki/90377_Sedna" title="90377 Sedna">Sedna</a> </td> <td>1 180 - <span class="nowrap"><span data-sort-value="7006180000000000000♠"></span>1<span style="margin-left:.25em;">800</span> <a href="/wiki/Chilometro" title="Chilometro">km</a></span> </td> <td>76,1 </td> <td>892 </td> <td><a href="/wiki/2003" title="2003">2003</a> </td> <td><a href="/wiki/Michael_E._Brown" title="Michael E. Brown">Michael E. Brown</a>, <a href="/wiki/Chad_Trujillo" title="Chad Trujillo">Chad Trujillo</a>, <a href="/wiki/David_L._Rabinowitz" class="mw-redirect" title="David L. Rabinowitz">David L. Rabinowitz</a> </td> <td>termico </td></tr> <tr> <td>_ </td> <td><a href="/wiki/2012_VP113" title="2012 VP113">2012 VP113</a><sup id="cite_ref-21" class="reference"><a href="#cite_note-21"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-22" class="reference"><a href="#cite_note-22"><span class="cite-bracket">[</span>22<span class="cite-bracket">]</span></a></sup> </td> <td>_ </td> <td>80,6 </td> <td>446 </td> <td><a href="/wiki/2012" title="2012">2012</a> </td> <td><a href="/wiki/Chad_Trujillo" title="Chad Trujillo">Chad Trujillo</a>, <a href="/wiki/Scott_Sheppard" class="mw-redirect" title="Scott Sheppard">Scott Sheppard</a> </td> <td>— </td></tr> <tr> <td>148209 </td> <td><a href="/wiki/(148209)_2000_CR105" title="(148209) 2000 CR105">(148209) 2000 CR<sub>105</sub></a> </td> <td>265 km </td> <td>44,3 </td> <td>397 </td> <td><a href="/wiki/2000" title="2000">2000</a> </td> <td><a href="/wiki/Lowell_Observatory" class="mw-redirect" title="Lowell Observatory">Lowell Observatory</a> </td> <td>— </td></tr></tbody></table> <div class="mw-heading mw-heading2"><h2 id="Note">Note</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Nube_di_Oort&veaction=edit&section=4" title="Modifica la sezione Note" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Nube_di_Oort&action=edit&section=4" title="Edit section's source code: Note"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-references-wrap mw-references-columns"><ol class="references"> <li id="cite_note-1"><a href="#cite_ref-1"><b>^</b></a> <span class="reference-text"><cite class="citation web" style="font-style:normal">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) Alessandro Morbidelli, <a rel="nofollow" class="external text" href="https://arxiv.org/PS_cache/astro-ph/pdf/0512/0512256v1.pdf"><span style="font-style:italic;">Origin and dynamical evolution of comets and their reservoirs</span></a> (<span style="font-weight: bolder; font-size:80%"><abbr title="documento in formato PDF">PDF</abbr></span>), su <span style="font-style:italic;">arxiv.org</span>, arxiv, 3 febbraio 2008. <small>URL consultato il 18 dicembre 2009</small>.</cite></span> </li> <li id="cite_note-2"><a href="#cite_ref-2"><b>^</b></a> <span class="reference-text"><cite class="citation cita" style="font-style:normal"><a href="#CITEREFRigutti">Rigutti</a>, p. 15</cite>.</span> </li> <li id="cite_note-Morbidelli2005-3"><a href="#cite_ref-Morbidelli2005_3-0"><b>^</b></a> <span class="reference-text"><cite class="citation web" style="font-style:normal"> Alessandro Morbidelli, <a rel="nofollow" class="external text" href="https://arxiv.org/abs/astro-ph/0512256v1"><span style="font-style:italic;">Origin and Dynamical Evolution of Comets and their Reservoirs</span></a>, su <span style="font-style:italic;">arxiv.org</span>, 2005.</cite></span> </li> <li id="cite_note-4"><a href="#cite_ref-4"><b>^</b></a> <span class="reference-text"><cite class="citation cita" style="font-style:normal"><a href="#CITEREFRigutti">Rigutti</a>, p. 13</cite>.</span> </li> <li id="cite_note-5"><a href="#cite_ref-5"><b>^</b></a> <span class="reference-text"> <cite class="citation pubblicazione" style="font-style:normal"> Ernst Julius Öpik, <a rel="nofollow" class="external text" href="https://oadoi.org/10.2307/20022899"><span style="font-style:italic;">Note on Stellar Perturbations of Nearby Parabolic Orbits</span></a>, in <span style="font-style:italic;"><a href="/w/index.php?title=Proceedings_of_the_American_Academy_of_Arts_and_Sciences&action=edit&redlink=1" class="new" title="Proceedings of the American Academy of Arts and Sciences (la pagina non esiste)">Proceedings of the American Academy of Arts and Sciences</a></span>, vol. 67, n. 6, 1932, pp. 169–182, <a href="/wiki/Digital_object_identifier" title="Digital object identifier">DOI</a>:<a rel="nofollow" class="external text" href="https://dx.doi.org/10.2307%2F20022899">10.2307/20022899</a>, <a href="/wiki/JSTOR" title="JSTOR">JSTOR</a> <a rel="nofollow" class="external text" href="http://www.jstor.org/stable/20022899">20022899</a>.</cite></span> </li> <li id="cite_note-Oort-6"><span class="mw-cite-backlink"><b>^</b> <sup><i><a href="#cite_ref-Oort_6-0">a</a></i></sup> <sup><i><a href="#cite_ref-Oort_6-1">b</a></i></sup></span> <span class="reference-text"><cite class="citation pubblicazione" style="font-style:normal"> Jan Oort, <span style="font-style:italic;">The structure of the cloud of comets surrounding the Solar System and a hypothesis concerning its origin</span>, in <span style="font-style:italic;">Bulletin of the Astronomical Institutes of the Netherlands</span>, vol. 11, 1950, pp. 91-110, <a href="/wiki/Bibcode" title="Bibcode">Bibcode</a>:<a rel="nofollow" class="external text" href="http://adsabs.harvard.edu/abs/1950BAN....11...91O">1950BAN....11...91O</a>.</cite></span> </li> <li id="cite_note-dave-7"><a href="#cite_ref-dave_7-0"><b>^</b></a> <span class="reference-text"><cite class="citation pubblicazione" style="font-style:normal">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) David C. Jewitt, <a rel="nofollow" class="external text" href="https://oadoi.org/10.1086/338692"><span style="font-style:italic;">From Kuiper Belt to Cometary Nucleus: The Missing Ultrared Matter</span></a>, in <span style="font-style:italic;">Astronomical Journal</span>, vol. 123, n. 2, 2001, pp. 1039-1049, <a href="/wiki/Digital_object_identifier" title="Digital object identifier">DOI</a>:<a rel="nofollow" class="external text" href="https://dx.doi.org/10.1086%2F338692">10.1086/338692</a>.</cite></span> </li> <li id="cite_note-book-8"><span class="mw-cite-backlink"><b>^</b> <sup><i><a href="#cite_ref-book_8-0">a</a></i></sup> <sup><i><a href="#cite_ref-book_8-1">b</a></i></sup> <sup><i><a href="#cite_ref-book_8-2">c</a></i></sup></span> <span class="reference-text"><cite class="citation libro" style="font-style:normal">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) Harold F. Levison, Luke Donnes, <a rel="nofollow" class="external text" href="https://archive.org/details/bwb_W8-BGD-739"><span style="font-style:italic;">Comet Populations and Cometary Dynamics</span></a>, in Lucy Ann Adams McFadden, Lucy-Ann Adams, Paul Robert Weissman, Torrence V. Johnson (a cura di), <span style="font-style:italic;">Encyclopedia of the Solar System</span>, 2ª ed., Amsterdam; Boston, Academic Press, 2007, pp. <a rel="nofollow" class="external text" href="https://archive.org/details/bwb_W8-BGD-739/page/575">575</a>-588, <a href="/wiki/ISBN" title="ISBN">ISBN</a> <a href="/wiki/Speciale:RicercaISBN/0-12-088589-1" title="Speciale:RicercaISBN/0-12-088589-1">0-12-088589-1</a>.</cite></span> </li> <li id="cite_note-Hills1981-9"><a href="#cite_ref-Hills1981_9-0"><b>^</b></a> <span class="reference-text"><cite class="citation pubblicazione" style="font-style:normal">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) Hills, J. G., <a rel="nofollow" class="external text" href="https://oadoi.org/10.1086/113058"><span style="font-style:italic;">Comet showers and the steady-state infall of comets from the Oort cloud</span></a>, in <span style="font-style:italic;">Astronomical Journal</span>, vol. 86, Nov. 1981, 1981, pp. 1730-1740, <a href="/wiki/Digital_object_identifier" title="Digital object identifier">DOI</a>:<a rel="nofollow" class="external text" href="https://dx.doi.org/10.1086%2F113058">10.1086/113058</a>.</cite></span> </li> <li id="cite_note-hills1981-10"><a href="#cite_ref-hills1981_10-0"><b>^</b></a> <span class="reference-text"> <cite class="citation pubblicazione" style="font-style:normal"> Jack G. Hills, <a rel="nofollow" class="external text" href="https://oadoi.org/10.1086/113058"><span style="font-style:italic;">Comet showers and the steady-state infall of comets from the Oort Cloud</span></a>, in <span style="font-style:italic;"><a href="/wiki/Astronomical_Journal" title="Astronomical Journal">Astronomical Journal</a></span>, vol. 86, 1981, pp. 1730–1740, <a href="/wiki/Bibcode" title="Bibcode">Bibcode</a>:<a rel="nofollow" class="external text" href="http://adsabs.harvard.edu/abs/1981AJ.....86.1730H">1981AJ.....86.1730H</a>, <a href="/wiki/Digital_object_identifier" title="Digital object identifier">DOI</a>:<a rel="nofollow" class="external text" href="https://dx.doi.org/10.1086%2F113058">10.1086/113058</a>.</cite></span> </li> <li id="cite_note-levison2001-11"><a href="#cite_ref-levison2001_11-0"><b>^</b></a> <span class="reference-text"> <cite class="citation pubblicazione" style="font-style:normal"> Harold F. Levison, Luke Dones, Martin J. Duncan, <a rel="nofollow" class="external text" href="https://archive.org/details/sim_astronomical-journal_2001-04_121_4/page/2253"><span style="font-style:italic;">The Origin of Halley-Type Comets: Probing the Inner Oort Cloud</span></a>, in <span style="font-style:italic;"><a href="/wiki/Astronomical_Journal" title="Astronomical Journal">Astronomical Journal</a></span>, vol. 121, n. 4, 2001, pp. 2253–2267, <a href="/wiki/Bibcode" title="Bibcode">Bibcode</a>:<a rel="nofollow" class="external text" href="http://adsabs.harvard.edu/abs/2001AJ....121.2253L">2001AJ....121.2253L</a>, <a href="/wiki/Digital_object_identifier" title="Digital object identifier">DOI</a>:<a rel="nofollow" class="external text" href="https://dx.doi.org/10.1086%2F319943">10.1086/319943</a>.</cite></span> </li> <li id="cite_note-Donahue1991-12"><a href="#cite_ref-Donahue1991_12-0"><b>^</b></a> <span class="reference-text"> <cite class="citation libro" style="font-style:normal"> Thomas M. Donahue (a cura di), <a rel="nofollow" class="external text" href="http://books.nap.edu/openbook.php?record_id=1790&page=R1"><span style="font-style:italic;">Planetary Sciences: American and Soviet Research, Proceedings from the U.S.-U.S.S.R. Workshop on Planetary Sciences</span></a>, Kathleen Kearney Trivers, and David M. Abramson, National Academy Press, 1991, p. 251, <a href="/wiki/ISBN" title="ISBN">ISBN</a> <a href="/wiki/Speciale:RicercaISBN/0-309-04333-6" title="Speciale:RicercaISBN/0-309-04333-6">0-309-04333-6</a>. <small>URL consultato il 18 marzo 2008</small>.</cite></span> </li> <li id="cite_note-Julio1997-13"><a href="#cite_ref-Julio1997_13-0"><b>^</b></a> <span class="reference-text"><cite class="citation pubblicazione" style="font-style:normal"> Julio A. Fernéndez, <a rel="nofollow" class="external text" href="https://web.archive.org/web/20080309155745/http://www.gps.caltech.edu/classes/ge133/reading/oort.pdf"><span style="font-style:italic;">The Formation of the Oort Cloud and the Primitive Galactic Environment</span></a> (<span style="font-weight: bolder; font-size:80%"><abbr title="documento in formato PDF">PDF</abbr></span>), in <span style="font-style:italic;"><a href="/wiki/Icarus_(rivista)" title="Icarus (rivista)">Icarus</a></span>, vol. 219, 1997, pp. 106–119, <a href="/wiki/Bibcode" title="Bibcode">Bibcode</a>:<a rel="nofollow" class="external text" href="http://adsabs.harvard.edu/abs/1997Icar..129..106F">1997Icar..129..106F</a>, <a href="/wiki/Digital_object_identifier" title="Digital object identifier">DOI</a>:<a rel="nofollow" class="external text" href="https://dx.doi.org/10.1006%2Ficar.1997.5754">10.1006/icar.1997.5754</a>. <small>URL consultato il 18 marzo 2008</small> <small>(archiviato dall'<abbr title="https://www.gps.caltech.edu/classes/ge133/reading/oort.pdf">url originale</abbr> il 9 marzo 2008)</small>.</cite></span> </li> <li id="cite_note-Weissman1983-14"><a href="#cite_ref-Weissman1983_14-0"><b>^</b></a> <span class="reference-text"><cite class="citation pubblicazione" style="font-style:normal">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) Weissman, P. R., <a rel="nofollow" class="external text" href="http://adsabs.harvard.edu/abs/1983A&A...118...90W"><span style="font-style:italic;">The mass of the Oort cloud</span></a>, in <span style="font-style:italic;">Astronomy and Astrophysics</span>, vol. 118, n. 1, 1983, pp. 90-94. <small>URL consultato il 28 settembre 2011</small>.</cite></span> </li> <li id="cite_note-jpl-search-15"><span class="mw-cite-backlink"><b>^</b> <sup><i><a href="#cite_ref-jpl-search_15-0">a</a></i></sup> <sup><i><a href="#cite_ref-jpl-search_15-1">b</a></i></sup></span> <span class="reference-text"><cite class="citation web" style="font-style:normal"> <a rel="nofollow" class="external text" href="https://ssd.jpl.nasa.gov/sbdb_query.cgi?obj_group=all;obj_kind=all;obj_numbered=all;OBJ_field=0;ORB_field=0;c1_group=ORB;c1_item=Bi;c1_op=%3E;c1_value=47;table_format=HTML;max_rows=100;format_option=comp;c_fields=AcBhBgBjBiBnBsAi;.cgifields=format_option;.cgifields=ast_orbit_class;.cgifields=table_format;.cgifields=obj_kind;.cgifields=obj_group;.cgifields=obj_numbered;.cgifields=com_orbit_class&query=1&c_sort=BiD"><span style="font-style:italic;">JPL Small-Body Database Search Engine: q > 47 (AU)</span></a>, su <span style="font-style:italic;">ssd.jpl.nasa.gov</span>, JPL Solar System Dynamics. <small>URL consultato il 26 marzo 2014</small>.</cite></span> </li> <li id="cite_note-jpldata-16"><a href="#cite_ref-jpldata_16-0"><b>^</b></a> <span class="reference-text"><cite class="citation web" style="font-style:normal"> <a rel="nofollow" class="external text" href="https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2012VP113"><span style="font-style:italic;">JPL Small-Body Database Browser: (2012 VP113)</span></a>, su <span style="font-style:italic;">ssd.jpl.nasa.gov</span>, Jet Propulsion Laboratory, 30 ottobre 2013 last obs (arc=~1 year). <small>URL consultato il 26 marzo 2014</small>.</cite></span> </li> <li id="cite_note-nature_letter-17"><a href="#cite_ref-nature_letter_17-0"><b>^</b></a> <span class="reference-text"><a href="/wiki/Digital_object_identifier" title="Digital object identifier">DOI</a>: <a rel="nofollow" class="external text" href="https://dx.doi.org/10.1038%2Fnature13156">10.1038/nature13156</a></span> </li> <li id="cite_note-Live-18"><span class="mw-cite-backlink"><b>^</b> <sup><i><a href="#cite_ref-Live_18-0">a</a></i></sup> <sup><i><a href="#cite_ref-Live_18-1">b</a></i></sup></span> <span class="reference-text"><cite class="citation web" style="font-style:normal"> Natalie Wolchover, <a rel="nofollow" class="external text" href="http://www.livescience.com/33032-mystery-planet-tyche-probably-not-there.html"><span style="font-style:italic;">Astronomers Doubt Giant Planet 'Tyche' Exists in Our Solar System</span></a>, su <span style="font-style:italic;">livescience.com</span>, 15 febbraio 2011.</cite></span> </li> <li id="cite_note-19"><a href="#cite_ref-19"><b>^</b></a> <span class="reference-text"><cite class="citation web" style="font-style:normal"> <a rel="nofollow" class="external text" href="http://www.space.com/10863-mystery-planet-tyche-debate.html"><span style="font-style:italic;">Astronomers Doubt Giant Planet 'Tyche' Exists in Our Solar System</span></a>, su <span style="font-style:italic;">space.com</span>, <a href="/wiki/Space.com" title="Space.com">Space.com</a>, 15 febbraio 2011.</cite></span> </li> <li id="cite_note-20"><a href="#cite_ref-20"><b>^</b></a> <span class="reference-text"><cite class="citation web" style="font-style:normal">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) <a rel="nofollow" class="external text" href="https://www.jpl.nasa.gov/news/news.php?release=2014-075"><span style="font-style:italic;">NASA's WISE Survey Finds Thousands of New Stars, But No 'Planet X'<span></span></span></a>, su <span style="font-style:italic;">jpl.nasa.gov</span>, NASA, 7 marzo 2014.</cite></span> </li> <li id="cite_note-21"><a href="#cite_ref-21"><b>^</b></a> <span class="reference-text"><cite class="citation web" style="font-style:normal"> <a rel="nofollow" class="external text" href="https://www.nasa.gov/content/nasa-supported-research-helps-redefine-solar-systems-edge"><span style="font-style:italic;">NASA Supported Research Helps Redefine Solar System's Edge - 26 marzo 2014</span></a>, su <span style="font-style:italic;">nasa.gov</span>.</cite></span> </li> <li id="cite_note-22"><a href="#cite_ref-22"><b>^</b></a> <span class="reference-text"><cite class="citation web" style="font-style:normal"> <a rel="nofollow" class="external text" href="http://home.dtm.ciw.edu/users/sheppard/inner_oort_cloud"><span style="font-style:italic;">Beyond the Edge of the Solar System: The Inner Oort Cloud Population</span></a>, su <span style="font-style:italic;">home.dtm.ciw.edu</span>.</cite></span> </li> </ol></div> <div class="mw-heading mw-heading2"><h2 id="Bibliografia">Bibliografia</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Nube_di_Oort&veaction=edit&section=5" title="Modifica la sezione Bibliografia" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Nube_di_Oort&action=edit&section=5" title="Edit section's source code: Bibliografia"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><cite id="CITEREFRigutti" class="citation libro" style="font-style:normal"> <a href="/wiki/Mario_Rigutti" title="Mario Rigutti">Mario Rigutti</a>, <a rel="nofollow" class="external text" href="http://books.google.com.ec/books?id=scARiNMhO0cC&dq=nube+di+oort+Nemesis&hl=it&source=gbs_navlinks_s"><span style="font-style:italic;">Comete, meteoriti e stelle cadenti. I corpi minori del sistema solare</span></a>, <a href="/wiki/Giunti_Editore" title="Giunti Editore">Giunti Editore</a>, 1997, <a href="/wiki/ISBN" title="ISBN">ISBN</a> <a href="/wiki/Speciale:RicercaISBN/978-88-09-21081-3" title="Speciale:RicercaISBN/978-88-09-21081-3">978-88-09-21081-3</a>.</cite></li></ul> <div class="mw-heading mw-heading2"><h2 id="Altri_progetti">Altri progetti</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Nube_di_Oort&veaction=edit&section=6" title="Modifica la sezione Altri progetti" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Nube_di_Oort&action=edit&section=6" title="Edit section's source code: Altri progetti"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <div id="interProject" class="toccolours" style="display: none; clear: both; margin-top: 2em"><p id="sisterProjects" style="background-color: #efefef; color: black; font-weight: bold; margin: 0"><span>Altri progetti</span></p><ul title="Collegamenti verso gli altri progetti Wikimedia"> <li class="" title=""><span class="plainlinks" title="commons:Category:Oort cloud"><a class="external text" href="https://commons.wikimedia.org/wiki/Category:Oort_cloud?uselang=it">Wikimedia Commons</a></span></li></ul></div> <ul><li><span typeof="mw:File"><a href="https://commons.wikimedia.org/wiki/?uselang=it" title="Collabora a Wikimedia Commons"><img alt="Collabora a Wikimedia Commons" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/18px-Commons-logo.svg.png" decoding="async" width="18" height="24" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/27px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/36px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></a></span> <span class="plainlinks"><a class="external text" href="https://commons.wikimedia.org/wiki/?uselang=it">Wikimedia Commons</a></span> contiene immagini o altri file su <b><span class="plainlinks"><a class="external text" href="https://commons.wikimedia.org/wiki/Category:Oort_cloud?uselang=it">nube di Oort</a></span></b></li></ul> <div class="mw-heading mw-heading2"><h2 id="Collegamenti_esterni">Collegamenti esterni</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Nube_di_Oort&veaction=edit&section=7" title="Modifica la sezione Collegamenti esterni" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Nube_di_Oort&action=edit&section=7" title="Edit section's source code: Collegamenti esterni"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li class="mw-empty-elt"></li> <li><cite id="CITEREFBritannica.com" class="citation web" style="font-style:normal">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) Armand H. Delsemme, <a rel="nofollow" class="external text" href="https://www.britannica.com/topic/Oort-cloud"><span style="font-style:italic;">Oort cloud</span></a>, su <span style="font-style:italic;"><a href="/wiki/Enciclopedia_Britannica" title="Enciclopedia Britannica">Enciclopedia Britannica</a></span>, Encyclopædia Britannica, Inc.</cite> <span class="mw-valign-text-top noprint" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q40864#P1417" title="Modifica su Wikidata"><img alt="Modifica su Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/10px-Blue_pencil.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/15px-Blue_pencil.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/20px-Blue_pencil.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></li> <li><cite class="citation web" style="font-style:normal">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) <a rel="nofollow" class="external text" href="http://www.ucs.louisiana.edu/~jjm9638/MS7292.pdf"><span style="font-style:italic;">Cometary evidence of a massive body in the outer Oort cloud</span></a> (<span style="font-weight: bolder; font-size:80%"><abbr title="documento in formato PDF">PDF</abbr></span>), su <span style="font-style:italic;">ucs.louisiana.edu</span>.</cite></li> <li><cite class="citation web" style="font-style:normal">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) <a rel="nofollow" class="external text" href="http://www.ucs.louisiana.edu/~jjm9638/assl.pdf"><span style="font-style:italic;">Variable Oort cloud flux due to the galactic tide</span></a> (<span style="font-weight: bolder; font-size:80%"><abbr title="documento in formato PDF">PDF</abbr></span>), su <span style="font-style:italic;">ucs.louisiana.edu</span>.</cite></li> <li><cite class="citation web" style="font-style:normal">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) <a rel="nofollow" class="external text" href="http://www.ta3.sk/caosp/Eedition/FullTexts/vol34no2/pp87-104.pdf"><span style="font-style:italic;">The tidal action of the homogeneous field of Galactic-disc matter and population of the outer Oort cloud</span></a> (<span style="font-weight: bolder; font-size:80%"><abbr title="documento in formato PDF">PDF</abbr></span>), su <span style="font-style:italic;">ta3.sk</span>.</cite></li></ul> <style data-mw-deduplicate="TemplateStyles:r141815314">.mw-parser-output .navbox{border:1px solid #aaa;clear:both;margin:auto;padding:2px;width:100%}.mw-parser-output .navbox th{padding-left:1em;padding-right:1em;text-align:center}.mw-parser-output .navbox>tbody>tr:first-child>th{background:#ccf;font-size:90%;width:100%;color:var(--color-base,black)}.mw-parser-output .navbox_navbar{float:left;margin:0;padding:0 10px 0 0;text-align:left;width:6em}.mw-parser-output .navbox_title{font-size:110%}.mw-parser-output .navbox_abovebelow{background:#ddf;font-size:90%;font-weight:normal}.mw-parser-output .navbox_group{background:#ddf;font-size:90%;padding:0 10px;white-space:nowrap}.mw-parser-output .navbox_list{font-size:90%;width:100%}.mw-parser-output .navbox_list a{white-space:nowrap}html:not(.vector-feature-night-mode-enabled) .mw-parser-output .navbox_odd{background:#fdfdfd;color:var(--color-base,black)}html:not(.vector-feature-night-mode-enabled) .mw-parser-output .navbox_even{background:#f7f7f7;color:var(--color-base,black)}.mw-parser-output .navbox a.mw-selflink{color:var(--color-base,black)}.mw-parser-output .navbox_center{text-align:center}.mw-parser-output .navbox .navbox_image{padding-left:7px;vertical-align:middle;width:0}.mw-parser-output .navbox+.navbox{margin-top:-1px}.mw-parser-output .navbox .mw-collapsible-toggle{font-weight:normal;text-align:right;width:7em}body.skin--responsive .mw-parser-output .navbox_image img{max-width:none!important}.mw-parser-output .subnavbox{margin:-3px;width:100%}.mw-parser-output .subnavbox_group{background:#e6e6ff;padding:0 10px}@media screen{html.skin-theme-clientpref-night .mw-parser-output .navbox>tbody>tr:first-child>th{background:var(--background-color-interactive)!important}html.skin-theme-clientpref-night .mw-parser-output .navbox th{color:var(--color-base)!important}html.skin-theme-clientpref-night .mw-parser-output .navbox_abovebelow,html.skin-theme-clientpref-night .mw-parser-output .navbox_group{background:var(--background-color-interactive-subtle)!important}html.skin-theme-clientpref-night .mw-parser-output .subnavbox_group{background:var(--background-color-neutral-subtle)!important}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbox>tbody>tr:first-child>th{background:var(--background-color-interactive)!important}html.skin-theme-clientpref-os .mw-parser-output .navbox th{color:var(--color-base)!important}html.skin-theme-clientpref-os .mw-parser-output .navbox_abovebelow,html.skin-theme-clientpref-os .mw-parser-output .navbox_group{background:var(--background-color-interactive-subtle)!important}html.skin-theme-clientpref-os .mw-parser-output .subnavbox_group{background:var(--background-color-neutral-subtle)!important}}</style><table class="navbox mw-collapsible autocollapse noprint metadata" id="navbox-Sistema_solare"><tbody><tr><th colspan="2"><div class="navbox_navbar"><div class="noprint plainlinks" style="background-color:transparent; padding:0; font-size:xx-small; color:var(--color-base, #000000); white-space:nowrap;"><a href="/wiki/Template:Sistema_solare" title="Template:Sistema solare"><span title="Vai alla pagina del template">V</span></a> · <a href="/wiki/Discussioni_template:Sistema_solare" title="Discussioni template:Sistema solare"><span title="Discuti del template">D</span></a> · <a class="external text" href="https://it.wikipedia.org/w/index.php?title=Template:Sistema_solare&action=edit"><span title="Modifica il template. Usa l'anteprima prima di salvare">M</span></a></div></div><span class="navbox_title">Il <a href="/wiki/Sistema_solare" title="Sistema solare">sistema solare</a></span></th></tr><tr><td colspan="2" class="navbox_list navbox_center navbox_odd"><figure class="mw-default-size noresize" typeof="mw:File"><span><img src="//upload.wikimedia.org/wikipedia/commons/4/4a/Solar_System_XXX.png" decoding="async" width="635" height="36" class="mw-file-element" data-file-width="635" data-file-height="36" usemap="#ImageMap_4e8f14d062e3bd97" /></span><map name="ImageMap_4e8f14d062e3bd97"><area href="/wiki/Sole" shape="circle" coords="0,0,90,35" alt="Sole" title="Sole" /><area href="/wiki/Mercurio_(astronomia)" shape="circle" coords="112,18,6" alt="Mercurio" title="Mercurio" /><area href="/wiki/Venere_(astronomia)" shape="circle" coords="153,18,8" alt="Venere" title="Venere" /><area href="/wiki/Luna" shape="circle" coords="203,8,4" alt="Luna" title="Luna" /><area href="/wiki/Terra" shape="circle" coords="194,18,8" alt="Terra" title="Terra" /><area href="/wiki/Satelliti_naturali_di_Marte" shape="circle" coords="239,13,3" alt="Fobos e Deimos" title="Fobos e Deimos" /><area href="/wiki/Marte_(astronomia)" shape="circle" coords="233,18,8" alt="Marte" title="Marte" /><area href="/wiki/Cerere_(astronomia)" shape="circle" coords="271,18,8" alt="Cerere" title="Cerere" /><area href="/wiki/Fascia_principale" shape="rect" coords="256,0,288,35" alt="Fascia principale" title="Fascia principale" /><area href="/wiki/Giove_(astronomia)" shape="circle" coords="316,18,15" alt="Giove" title="Giove" /><area href="/wiki/Satelliti_naturali_di_Giove" shape="circle" coords="329,5,6" alt="Satelliti naturali di Giove" title="Satelliti naturali di Giove" /><area href="/wiki/Saturno_(astronomia)" shape="circle" coords="372,18,10" alt="Saturno" title="Saturno" /><area href="/wiki/Satelliti_naturali_di_Saturno" shape="circle" coords="381,7,6" alt="Satelliti naturali di Saturno" title="Satelliti naturali di Saturno" /><area href="/wiki/Urano_(astronomia)" shape="circle" coords="418,18,9" alt="Urano" title="Urano" /><area href="/wiki/Satelliti_naturali_di_Urano" shape="circle" coords="427,10,6" alt="Satelliti naturali di Urano" title="Satelliti naturali di Urano" /><area href="/wiki/Satelliti_naturali_di_Nettuno" shape="circle" coords="471,10,3" alt="Satelliti naturali di Nettuno" title="Satelliti naturali di Nettuno" /><area href="/wiki/Nettuno_(astronomia)" shape="circle" coords="462,18,12" alt="Nettuno" title="Nettuno" /><area href="/wiki/Satelliti_naturali_di_Plutone" shape="circle" coords="508,13,3" alt="Satelliti naturali di Plutone" title="Satelliti naturali di Plutone" /><area href="/wiki/Plutone_(astronomia)" shape="circle" coords="504,18,8" alt="Plutone" title="Plutone" /><area href="/wiki/Haumea_(astronomia)#Satelliti_naturali" shape="circle" coords="539,13,3" alt="Satelliti naturali di Haumea" title="Satelliti naturali di Haumea" /><area href="/wiki/Haumea_(astronomia)" shape="circle" coords="535,18,8" alt="Haumea" title="Haumea" /><area href="/wiki/S/2015_(136472)_1" shape="circle" coords="570,13,3" alt="Satelliti naturali di Makemake" title="Satelliti naturali di Makemake" /><area href="/wiki/Makemake_(astronomia)" shape="circle" coords="564,18,8" alt="Makemake" title="Makemake" /><area href="/wiki/Fascia_di_Kuiper" shape="rect" coords="492,0,573,35" alt="Fascia di Kuiper" title="Fascia di Kuiper" /><area href="/wiki/Disnomia_(astronomia)" shape="circle" coords="601,14,3" alt="Disnomia" title="Disnomia" /><area href="/wiki/Eris_(astronomia)" shape="circle" coords="597,18,8" alt="Eris" title="Eris" /><area href="/wiki/90377_Sedna" shape="circle" coords="626,18,8" alt="Sedna" title="Sedna" /><area href="/wiki/Disco_diffuso" shape="rect" coords="574,0,610,35" alt="Disco diffuso" title="Disco diffuso" /><area href="/wiki/Nube_di_Oort" shape="rect" coords="611,0,635,35" alt="Nube di Oort" title="Nube di Oort" /></map><figcaption></figcaption></figure></td></tr><tr><th colspan="1" class="navbox_group"><a href="/wiki/Stella" title="Stella">Stella</a></th><td colspan="1" class="navbox_list navbox_even"><a href="/wiki/Sole" title="Sole">Sole</a> (<a href="/wiki/Eliosfera" title="Eliosfera">Eliosfera</a><b> ·</b> <a href="/wiki/Corrente_eliosferica_diffusa" title="Corrente eliosferica diffusa">Corrente eliosferica diffusa</a><b> ·</b> <a href="/wiki/Campo_magnetico_interplanetario" title="Campo magnetico interplanetario">Campo magnetico interplanetario</a>)</td></tr><tr><th colspan="1" class="navbox_group"><a href="/wiki/Pianeta" title="Pianeta">Pianeti</a><br /><small>(☾ = <a href="/wiki/Satellite_naturale" title="Satellite naturale">luna/e</a> ∅ = <a href="/wiki/Anello_planetario" title="Anello planetario">anelli</a>)</small></th><td colspan="1" class="navbox_list navbox_odd"><a href="/wiki/Mercurio_(astronomia)" title="Mercurio (astronomia)">Mercurio</a><b> ·</b> <a href="/wiki/Venere_(astronomia)" title="Venere (astronomia)">Venere</a><b> ·</b> <a href="/wiki/Terra" title="Terra">Terra</a> (<a href="/wiki/Luna" title="Luna">☾</a> )<b> ·</b> <a href="/wiki/Marte_(astronomia)" title="Marte (astronomia)">Marte</a> (<a href="/wiki/Satelliti_naturali_di_Marte" title="Satelliti naturali di Marte">☾</a> )<b> ·</b> <a href="/wiki/Giove_(astronomia)" title="Giove (astronomia)">Giove</a> (<a href="/wiki/Satelliti_naturali_di_Giove" title="Satelliti naturali di Giove">☾</a> <a href="/wiki/Anelli_di_Giove" title="Anelli di Giove">∅</a>)<b> ·</b> <a href="/wiki/Saturno_(astronomia)" title="Saturno (astronomia)">Saturno</a> (<a href="/wiki/Satelliti_naturali_di_Saturno" title="Satelliti naturali di Saturno">☾</a> <a href="/wiki/Anelli_di_Saturno" title="Anelli di Saturno">∅</a>)<b> ·</b> <a href="/wiki/Urano_(astronomia)" title="Urano (astronomia)">Urano</a> (<a href="/wiki/Satelliti_naturali_di_Urano" title="Satelliti naturali di Urano">☾</a> <a href="/wiki/Anelli_di_Urano" title="Anelli di Urano">∅</a>)<b> ·</b> <a href="/wiki/Nettuno_(astronomia)" title="Nettuno (astronomia)">Nettuno</a> (<a href="/wiki/Satelliti_naturali_di_Nettuno" title="Satelliti naturali di Nettuno">☾</a> <a href="/wiki/Anelli_di_Nettuno" title="Anelli di Nettuno">∅</a>)</td></tr><tr><th colspan="1" class="navbox_group"><a href="/wiki/Pianeta_nano" title="Pianeta nano">Pianeti nani</a></th><td colspan="1" class="navbox_list navbox_even"><a href="/wiki/Cerere_(astronomia)" title="Cerere (astronomia)">Cerere</a><b> ·</b> <a href="/wiki/Plutone_(astronomia)" title="Plutone (astronomia)">Plutone</a> (<a href="/wiki/Satelliti_naturali_di_Plutone" title="Satelliti naturali di Plutone">☾</a> )<b> ·</b> <a href="/wiki/Haumea_(astronomia)" title="Haumea (astronomia)">Haumea</a> (<a href="/wiki/Haumea_(astronomia)#Satelliti_naturali" title="Haumea (astronomia)">☾</a> )<b> ·</b> <a href="/wiki/Makemake_(astronomia)" title="Makemake (astronomia)">Makemake</a> (<a href="/wiki/S/2015_(136472)_1" title="S/2015 (136472) 1">☾</a> )<b> ·</b> <a href="/wiki/Eris_(astronomia)" title="Eris (astronomia)">Eris</a> (<a href="/wiki/Disnomia_(astronomia)" title="Disnomia (astronomia)">☾</a> )</td></tr><tr><th colspan="1" class="navbox_group"><a href="/wiki/Corpo_minore" title="Corpo minore">Corpi minori</a></th><td colspan="1" class="navbox_list navbox_odd"><a href="/wiki/Asteroide" title="Asteroide">Asteroidi</a> (<a href="/wiki/Vulcanoide" title="Vulcanoide">Vulcanoidi</a> · <a href="/wiki/Asteroide_near-Earth" title="Asteroide near-Earth">NEA</a> · <a href="/wiki/Fascia_principale" title="Fascia principale">Fascia principale</a> · <a href="/wiki/Troiano_(astronomia)" title="Troiano (astronomia)">Troiani</a> · <a href="/wiki/Centauro_(astronomia)" title="Centauro (astronomia)">Centauri</a>)<b> ·</b> <a href="/wiki/Oggetto_transnettuniano" title="Oggetto transnettuniano">TNO</a> (<a href="/wiki/Fascia_di_Kuiper" title="Fascia di Kuiper">Fascia di Kuiper</a> · <a href="/wiki/Disco_diffuso" title="Disco diffuso">Disco diffuso</a>)<b> ·</b> <a href="/wiki/Cometa" title="Cometa">Comete</a> (<a href="/wiki/Cometa_radente" title="Cometa radente">Radenti</a> · <a href="/wiki/Cometa_periodica" title="Cometa periodica">Periodiche</a> · <a href="/wiki/Cometa_non_periodica" title="Cometa non periodica">Non periodiche</a> · <a href="/wiki/Damocloide" title="Damocloide">Damocloidi</a> · <a class="mw-selflink selflink">Nube di Oort</a>)</td></tr><tr><th colspan="1" class="navbox_group">Argomenti correlati</th><td colspan="1" class="navbox_list navbox_even"><a href="/wiki/Sistema_planetario" title="Sistema planetario">Sistema planetario</a><b> ·</b> <a href="/wiki/Pianeta_extrasolare" title="Pianeta extrasolare">Pianeta extrasolare</a><b> ·</b> <a href="/wiki/Definizione_di_pianeta" title="Definizione di pianeta">Definizione di pianeta</a><b> ·</b> <a href="/wiki/Pianeti_ipotetici" title="Pianeti ipotetici">Pianeti ipotetici</a></td></tr></tbody></table> <style data-mw-deduplicate="TemplateStyles:r140554510">.mw-parser-output .CdA{border:1px solid #aaa;width:100%;margin:auto;font-size:90%;padding:2px}.mw-parser-output .CdA th{background-color:#f2f2f2;font-weight:bold;width:20%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .CdA{border-color:#54595D}html.skin-theme-clientpref-night .mw-parser-output .CdA th{background-color:#202122}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .CdA{border-color:#54595D}html.skin-theme-clientpref-os .mw-parser-output .CdA th{background-color:#202122}}</style><table class="CdA"><tbody><tr><th><a href="/wiki/Aiuto:Controllo_di_autorit%C3%A0" title="Aiuto:Controllo di autorità">Controllo di autorità</a></th><td><a href="/wiki/Virtual_International_Authority_File" title="Virtual International Authority File">VIAF</a> <span class="uid">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) <a rel="nofollow" class="external text" href="https://viaf.org/viaf/307321359">307321359</a></span><span style="font-weight:bold;"> ·</span> <a href="/wiki/Library_of_Congress_Control_Number" title="Library of Congress Control Number">LCCN</a> <span class="uid">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) <a rel="nofollow" class="external text" href="http://id.loc.gov/authorities/subjects/sh86000523">sh86000523</a></span><span style="font-weight:bold;"> ·</span> <a href="/wiki/Biblioteca_nazionale_di_Israele" title="Biblioteca nazionale di Israele">J9U</a> <span class="uid">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr>, <abbr title="ebraico">HE</abbr></span>) <a rel="nofollow" class="external text" href="http://olduli.nli.org.il/F/?func=find-b&local_base=NLX10&find_code=UID&request=987007539066105171">987007539066105171</a></span></td></tr></tbody></table> <div 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