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href="#Forudsætningen_for_flydende_vand"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Forudsætningen for flydende vand</span> </div> </a> <ul id="toc-Forudsætningen_for_flydende_vand-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Vandmåner_og_vanddværgplaneter" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Vandmåner_og_vanddværgplaneter"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Vandmåner og vanddværgplaneter</span> </div> </a> <ul id="toc-Vandmåner_og_vanddværgplaneter-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Exoplaneter" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Exoplaneter"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Exoplaneter</span> </div> </a> <ul id="toc-Exoplaneter-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Se_også" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Se_også"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Se også</span> </div> </a> <ul id="toc-Se_også-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Eksterne_links_og_henvisninger" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Eksterne_links_og_henvisninger"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Eksterne links og henvisninger</span> </div> </a> <ul id="toc-Eksterne_links_og_henvisninger-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="Indhold" 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="Vis/skjul indholdsfortegnelsen" > <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">Vis/skjul indholdsfortegnelsen</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">Vandverden</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="Gå til en artikel på et andet sprog. Tilgængelig på 34 sprog" > <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-34" 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">34 sprog</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/Oseaanw%C3%AAreld" title="Oseaanwêreld – afrikaans" lang="af" hreflang="af" data-title="Oseaanwêreld" 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/Planeta_oceano" title="Planeta oceano – aragonsk" lang="an" hreflang="an" data-title="Planeta oceano" data-language-autonym="Aragonés" data-language-local-name="aragonsk" 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/%D9%83%D9%88%D9%83%D8%A8_%D9%85%D8%AD%D9%8A%D8%B7%D9%8A" title="كوكب محيطي – arabisk" lang="ar" hreflang="ar" data-title="كوكب محيطي" data-language-autonym="العربية" data-language-local-name="arabisk" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%AE%E0%A6%B9%E0%A6%BE%E0%A6%B8%E0%A6%BE%E0%A6%97%E0%A6%B0%E0%A7%80%E0%A6%AF%E0%A6%BC_%E0%A6%97%E0%A7%8D%E0%A6%B0%E0%A6%B9" title="মহাসাগরীয় গ্রহ – bengali" lang="bn" hreflang="bn" data-title="মহাসাগরীয় গ্রহ" data-language-autonym="বাংলা" data-language-local-name="bengali" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Planeta_oce%C3%A0" title="Planeta oceà – catalansk" lang="ca" hreflang="ca" data-title="Planeta oceà" data-language-autonym="Català" data-language-local-name="catalansk" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Ozeanplanet" title="Ozeanplanet – tysk" lang="de" hreflang="de" data-title="Ozeanplanet" data-language-autonym="Deutsch" data-language-local-name="tysk" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Ocean_world" title="Ocean world – engelsk" lang="en" hreflang="en" data-title="Ocean world" data-language-autonym="English" data-language-local-name="engelsk" 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/Oceana_planedo" title="Oceana planedo – esperanto" lang="eo" hreflang="eo" data-title="Oceana planedo" data-language-autonym="Esperanto" data-language-local-name="esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Planeta_oc%C3%A9ano" title="Planeta océano – spansk" lang="es" hreflang="es" data-title="Planeta océano" data-language-autonym="Español" data-language-local-name="spansk" 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/Ookeaniplaneet" title="Ookeaniplaneet – estisk" lang="et" hreflang="et" data-title="Ookeaniplaneet" data-language-autonym="Eesti" data-language-local-name="estisk" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%AF%D9%86%DB%8C%D8%A7%DB%8C_%D8%A7%D9%82%DB%8C%D8%A7%D9%86%D9%88%D8%B3%DB%8C" title="دنیای اقیانوسی – persisk" lang="fa" hreflang="fa" data-title="دنیای اقیانوسی" data-language-autonym="فارسی" data-language-local-name="persisk" 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/Valtameriplaneetta" title="Valtameriplaneetta – finsk" lang="fi" hreflang="fi" data-title="Valtameriplaneetta" data-language-autonym="Suomi" data-language-local-name="finsk" 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/Plan%C3%A8te-oc%C3%A9an" title="Planète-océan – fransk" lang="fr" hreflang="fr" data-title="Planète-océan" data-language-autonym="Français" data-language-local-name="fransk" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-fy mw-list-item"><a href="https://fy.wikipedia.org/wiki/Oseaanplaneet" title="Oseaanplaneet – vestfrisisk" lang="fy" hreflang="fy" data-title="Oseaanplaneet" data-language-autonym="Frysk" data-language-local-name="vestfrisisk" class="interlanguage-link-target"><span>Frysk</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Planet_samudera" title="Planet samudera – indonesisk" lang="id" hreflang="id" data-title="Planet samudera" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonesisk" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Pianeta_oceanico" title="Pianeta oceanico – italiensk" lang="it" hreflang="it" data-title="Pianeta oceanico" data-language-autonym="Italiano" data-language-local-name="italiensk" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E6%B5%B7%E6%B4%8B%E6%83%91%E6%98%9F" title="海洋惑星 – japansk" lang="ja" hreflang="ja" data-title="海洋惑星" data-language-autonym="日本語" data-language-local-name="japansk" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EB%B0%94%EB%8B%A4_%ED%96%89%EC%84%B1" title="바다 행성 – koreansk" lang="ko" hreflang="ko" data-title="바다 행성" data-language-autonym="한국어" data-language-local-name="koreansk" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/%C5%AAdens_plan%C4%93ta" title="Ūdens planēta – lettisk" lang="lv" hreflang="lv" data-title="Ūdens planēta" data-language-autonym="Latviešu" data-language-local-name="lettisk" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Planet_lautan" title="Planet lautan – malajisk" lang="ms" hreflang="ms" data-title="Planet lautan" data-language-autonym="Bahasa Melayu" data-language-local-name="malajisk" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Oceaanplaneet" title="Oceaanplaneet – nederlandsk" lang="nl" hreflang="nl" data-title="Oceaanplaneet" data-language-autonym="Nederlands" data-language-local-name="nederlandsk" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-pa mw-list-item"><a href="https://pa.wikipedia.org/wiki/%E0%A8%B8%E0%A8%AE%E0%A9%81%E0%A9%B0%E0%A8%A6%E0%A8%B0%E0%A9%80_%E0%A8%B8%E0%A9%B0%E0%A8%B8%E0%A8%BE%E0%A8%B0" title="ਸਮੁੰਦਰੀ ਸੰਸਾਰ – punjabisk" lang="pa" hreflang="pa" data-title="ਸਮੁੰਦਰੀ ਸੰਸਾਰ" data-language-autonym="ਪੰਜਾਬੀ" data-language-local-name="punjabisk" class="interlanguage-link-target"><span>ਪੰਜਾਬੀ</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Planeta_oceaniczna" title="Planeta oceaniczna – polsk" lang="pl" hreflang="pl" data-title="Planeta oceaniczna" data-language-autonym="Polski" data-language-local-name="polsk" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Planeta_oce%C3%A2nico" title="Planeta oceânico – portugisisk" lang="pt" hreflang="pt" data-title="Planeta oceânico" data-language-autonym="Português" data-language-local-name="portugisisk" 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/Planet%C4%83_oceanic%C4%83" title="Planetă oceanică – rumænsk" lang="ro" hreflang="ro" data-title="Planetă oceanică" data-language-autonym="Română" data-language-local-name="rumænsk" 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%9F%D0%BB%D0%B0%D0%BD%D0%B5%D1%82%D0%B0-%D0%BE%D0%BA%D0%B5%D0%B0%D0%BD" title="Планета-океан – russisk" lang="ru" hreflang="ru" data-title="Планета-океан" data-language-autonym="Русский" data-language-local-name="russisk" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Ocean_planet" title="Ocean planet – Simple English" lang="en-simple" hreflang="en-simple" data-title="Ocean planet" 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-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Vattenplanet" title="Vattenplanet – svensk" lang="sv" hreflang="sv" data-title="Vattenplanet" data-language-autonym="Svenska" data-language-local-name="svensk" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B8%94%E0%B8%B2%E0%B8%A7%E0%B9%80%E0%B8%84%E0%B8%A3%E0%B8%B2%E0%B8%B0%E0%B8%AB%E0%B9%8C%E0%B8%A1%E0%B8%AB%E0%B8%B2%E0%B8%AA%E0%B8%A1%E0%B8%B8%E0%B8%97%E0%B8%A3" title="ดาวเคราะห์มหาสมุทร – thai" lang="th" hreflang="th" data-title="ดาวเคราะห์มหาสมุทร" data-language-autonym="ไทย" data-language-local-name="thai" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Okyanus_gezegeni" title="Okyanus gezegeni – tyrkisk" lang="tr" hreflang="tr" data-title="Okyanus gezegeni" data-language-autonym="Türkçe" data-language-local-name="tyrkisk" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%9F%D0%BB%D0%B0%D0%BD%D0%B5%D1%82%D0%B0-%D0%BE%D0%BA%D0%B5%D0%B0%D0%BD" title="Планета-океан – ukrainsk" lang="uk" hreflang="uk" data-title="Планета-океан" data-language-autonym="Українська" data-language-local-name="ukrainsk" 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%B3%D9%85%D9%86%D8%AF%D8%B1%DB%8C_%D8%AF%D9%86%DB%8C%D8%A7" title="سمندری دنیا – urdu" lang="ur" hreflang="ur" data-title="سمندری دنیا" data-language-autonym="اردو" data-language-local-name="urdu" class="interlanguage-link-target"><span>اردو</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/H%C3%A0nh_tinh_%C4%91%E1%BA%A1i_d%C6%B0%C6%A1ng" title="Hành tinh đại dương – vietnamesisk" lang="vi" hreflang="vi" data-title="Hành tinh đại dương" data-language-autonym="Tiếng Việt" data-language-local-name="vietnamesisk" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E6%B5%B7%E6%B4%8B%E8%A1%8C%E6%98%9F" title="海洋行星 – kinesisk" lang="zh" hreflang="zh" data-title="海洋行星" data-language-autonym="中文" data-language-local-name="kinesisk" class="interlanguage-link-target"><span>中文</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q1045138#sitelinks-wikipedia" title="Redigér sproglinks" 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den frie encyklopædi</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="da" dir="ltr"><figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Fil:PIA19656-SaturnMoon-Enceladus-Ocean-ArtConcept-20150915.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/7/70/PIA19656-SaturnMoon-Enceladus-Ocean-ArtConcept-20150915.jpg/220px-PIA19656-SaturnMoon-Enceladus-Ocean-ArtConcept-20150915.jpg" decoding="async" width="220" height="124" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/70/PIA19656-SaturnMoon-Enceladus-Ocean-ArtConcept-20150915.jpg/330px-PIA19656-SaturnMoon-Enceladus-Ocean-ArtConcept-20150915.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/70/PIA19656-SaturnMoon-Enceladus-Ocean-ArtConcept-20150915.jpg/440px-PIA19656-SaturnMoon-Enceladus-Ocean-ArtConcept-20150915.jpg 2x" data-file-width="5000" data-file-height="2812" /></a><figcaption>Diagram af vandmånen <a href="/wiki/Enceladus_(m%C3%A5ne)" title="Enceladus (måne)">Enceladus</a></figcaption></figure> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Fil:Ganymede_diagram.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/4/43/Ganymede_diagram.svg/220px-Ganymede_diagram.svg.png" decoding="async" width="220" height="134" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/43/Ganymede_diagram.svg/330px-Ganymede_diagram.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/43/Ganymede_diagram.svg/440px-Ganymede_diagram.svg.png 2x" data-file-width="2800" data-file-height="1700" /></a><figcaption>Diagram af vandmånen <a href="/wiki/Ganymedes_(m%C3%A5ne)" title="Ganymedes (måne)">Ganymedes</a></figcaption></figure> <p>En <b>vandverden</b> eller en <b>oceanverden</b> er et himmellegeme, der indeholder en betydelig mængde af flydende <a href="/wiki/Vand" title="Vand">vand</a>, enten på overfladen eller under overfladen under en skal af is. Det kan være en vand<a href="/wiki/Planet" title="Planet">planet</a>, en oceanplanet, en vand<a href="/wiki/M%C3%A5ne" title="Måne">måne</a> eller en oceanmåne. <a href="/wiki/Komet" title="Komet">Kometer</a> betegnes normalt ikke som vandverdener, selv om de kan indeholde forholdsvis store mængder is. Betegnelsen oceanverden er også blevet brugt nogle gange for himmellegemer med en stor mængde af en væske som ikke er vand, som for eksempel <a href="/wiki/Lava" title="Lava">lava</a> (på <a href="/wiki/Jupiter_(planet)" title="Jupiter (planet)">Jupiters</a> måne <a href="/wiki/Io_(m%C3%A5ne)" title="Io (måne)">Io</a>) eller <a href="/wiki/Ammoniak" title="Ammoniak">ammoniak</a> (som i det indre ocean på <a href="/wiki/Saturn" title="Saturn">Saturns</a> største måne <a href="/wiki/Titan_(m%C3%A5ne)" title="Titan (måne)">Titan</a>). </p><p><a href="/wiki/Jorden" title="Jorden">Jorden</a> er det eneste sted man kender i hele universet med flydende vand på overfladen. Vandverdener er af ekstrem interesse for astrobiologer på grund af disse verdeners potentiale til at udvikle <a href="/wiki/Liv" title="Liv">liv</a> og opretholde den biologiske aktivitet over geologiske tidshorisonter. Der er ledes ihærdigt efter <a href="/wiki/Exoplanet" title="Exoplanet">exoplaneter</a> med betingelser for flydende vand, da flydende vand anses for at være en nødvendig forudsætning for liv.<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> </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Forudsætningen_for_flydende_vand"><span id="Foruds.C3.A6tningen_for_flydende_vand"></span>Forudsætningen for flydende vand</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Vandverden&veaction=edit&section=1" title="Redigér afsnit: Forudsætningen for flydende vand" class="mw-editsection-visualeditor"><span>redigér</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Vandverden&action=edit&section=1" title="Edit section's source code: Forudsætningen for flydende vand"><span>rediger kildetekst</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Forudsætningen for at vand ikke er i form af is, men er flydende, er først og fremmest at der tilføres tilstrækkelig energi for at balancere afkølingen til verdensrummet, f.eks. stråling fra <a href="/wiki/Solen" title="Solen">Solen</a> jf. den <a href="/wiki/Beboelige_zone" class="mw-redirect" title="Beboelige zone">beboelige zone</a>, fra <a href="/wiki/Radioaktivitet" title="Radioaktivitet">radioaktivitet</a>, eller eventuelt igennem <a href="/wiki/Vulkan" title="Vulkan">vulkanisme</a> eller fra <a href="/wiki/Tidevand" title="Tidevand">tidevandskræfter</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Vandmåner_og_vanddværgplaneter"><span id="Vandm.C3.A5ner_og_vanddv.C3.A6rgplaneter"></span>Vandmåner og vanddværgplaneter</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Vandverden&veaction=edit&section=2" title="Redigér afsnit: Vandmåner og vanddværgplaneter" class="mw-editsection-visualeditor"><span>redigér</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Vandverden&action=edit&section=2" title="Edit section's source code: Vandmåner og vanddværgplaneter"><span>rediger kildetekst</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>De bedst etablerede vandverdener i vores <a href="/wiki/Solsystem" class="mw-redirect" title="Solsystem">solsystemet</a> omfatter månerne Saturns måne <a href="/wiki/Enceladus_(m%C3%A5ne)" title="Enceladus (måne)">Enceladus</a>, og Jupiters måner <a href="/wiki/Europa_(m%C3%A5ne)" title="Europa (måne)">Europa</a>, <a href="/wiki/Ganymedes_(m%C3%A5ne)" title="Ganymedes (måne)">Ganymedes</a> og <a href="/wiki/Callisto_(m%C3%A5ne)" class="mw-redirect" title="Callisto (måne)">Callisto</a>. Det forventes at en del himmellegemer i det ydre af vores solsystem kan have oceaner af vand under overfladen, f.eks. dværgplaneterne <a href="/wiki/Pluto_(dv%C3%A6rgplanet)" title="Pluto (dværgplanet)">Pluto</a>, <a href="/wiki/Ceres_(dv%C3%A6rgplanet)" title="Ceres (dværgplanet)">Ceres</a> og <a href="/wiki/Eris" title="Eris">Eris</a> samt Saturns måner <a href="/wiki/Dione_(m%C3%A5ne)" title="Dione (måne)">Dione</a> og <a href="/wiki/Mimas_(m%C3%A5ne)" title="Mimas (måne)">Mimas</a>, Uranus måne <a href="/wiki/Oberon_(m%C3%A5ne)" title="Oberon (måne)">Oberon</a> og Neptuns måne <a href="/wiki/Triton_(m%C3%A5ne)" title="Triton (måne)">Triton</a>. </p><p>For et koldt, mindre himmellegeme som <a href="/wiki/Enceladus_(m%C3%A5ne)" title="Enceladus (måne)">Enceladus</a> vil der være et ocean af flydende vand imellem en fast overflade af is og et fast lag af klipper i kernen bestående af <a href="/wiki/Silikat" title="Silikat">silikater</a>. For et koldt, større himmellegeme som <a href="/wiki/Ganymedes_(m%C3%A5ne)" title="Ganymedes (måne)">Ganymedes</a> vil der også være en overflade af is, men vandet i bunden af det flydende hav være under højt tryk og omdannes til is, så det flydende vand vil danne en "vand-sandwich", et hav, der ligger mellem to lag is. En vigtig forskel mellem disse to tilfælde, er, at for de små himmellegemer er havet i direkte kontakt med silikater, som kan give energi og næringsstoffer til simple former for liv. </p> <div class="mw-heading mw-heading2"><h2 id="Exoplaneter">Exoplaneter</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Vandverden&veaction=edit&section=3" title="Redigér afsnit: Exoplaneter" class="mw-editsection-visualeditor"><span>redigér</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Vandverden&action=edit&section=3" title="Edit section's source code: Exoplaneter"><span>rediger kildetekst</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Uden for vores solsystem er de følgende <a href="/wiki/Exoplanet" title="Exoplanet">exoplaneter</a> de mest sandsynlige bud på vandplaneter: GJ 357 d, <a href="/wiki/Proxima_Centauri_b" title="Proxima Centauri b">Proxima-b</a>, Kepler-11, GJ 1214 b, <a href="/wiki/Kepler-22b" title="Kepler-22b">Kepler-22b</a>, Kepler-62f, Kepler-62e og TRAPPIST-1-systemet. </p> <div class="mw-heading mw-heading2"><h2 id="Se_også"><span id="Se_ogs.C3.A5"></span>Se også</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Vandverden&veaction=edit&section=4" title="Redigér afsnit: Se også" class="mw-editsection-visualeditor"><span>redigér</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Vandverden&action=edit&section=4" title="Edit section's source code: Se også"><span>rediger kildetekst</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Klippeplanet" title="Klippeplanet">Klippeplanet</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Eksterne_links_og_henvisninger">Eksterne links og henvisninger</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Vandverden&veaction=edit&section=5" title="Redigér afsnit: Eksterne links og henvisninger" class="mw-editsection-visualeditor"><span>redigér</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Vandverden&action=edit&section=5" title="Edit section's source code: Eksterne links og henvisninger"><span>rediger kildetekst</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r11780210">.mw-parser-output .reflist{font-size:90%;margin-bottom:0.5em;list-style-type:decimal}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><a href="#cite_ref-1">^</a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="https://www.space.com/solar-system-ocean-moon-habitable-ice-shell">Our solar system's ocean moons may be habitable — and their icy shells could hold proof. Space.com 2024</a></span> </li> </ol></div></div> <ul><li><a rel="nofollow" class="external text" href="http://nyheder.tv2.dk/udland/2016-08-24-sensationel-opdagelse-planet-ligger-taet-paa-jorden-og-kan-have-liv">Sensationel opdagelse: Planet ligger tæt på Jorden og kan have liv. TV2 2016</a></li> <li><a rel="nofollow" class="external text" href="http://politiken.dk/viden/art5475949/Havareret-vandplanet-er-fundet-nær-en-udbrændt-sol">Havareret vandplanet er fundet nær en udbrændt sol. Politiken 2013</a></li> <li><a rel="nofollow" class="external text" href="https://videnskab.dk/miljo-naturvidenskab/hubble-har-fundet-spor-af-vand-pa-exoplaneter">Hubble har fundet spor af vand på exoplaneter. Videnskab.dk 2013</a></li> <li><a rel="nofollow" class="external text" href="https://phys.org/news/2019-07-tess-satellite-uncovers-nearby-super-earth.html">TESS satellite uncovers 'first nearby super-Earth. PhysOrg 2019</a></li> <li><a rel="nofollow" class="external text" href="https://www.universetoday.com/131668/planets-around-proxima-likely-water-worlds/">PLANETS AROUND STARS LIKE PROXIMA CENTAURI ARE PROBABLY EARTH-SIZED WATER WORLDS. 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