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class="vector-toc vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">Indhold</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">flyt til sidebjælken</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">skjul</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">Indledning</div> </a> </li> <li id="toc-Findes_der_liv_på_andre_planeter?" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Findes_der_liv_på_andre_planeter?"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Findes der liv på andre planeter?</span> </div> </a> <ul id="toc-Findes_der_liv_på_andre_planeter?-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Findes_der_intelligent_liv_på_andre_planeter?" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Findes_der_intelligent_liv_på_andre_planeter?"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Findes der intelligent liv på andre planeter?</span> </div> </a> <button aria-controls="toc-Findes_der_intelligent_liv_på_andre_planeter?-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Vis/skjul underafsnit Findes der intelligent liv på andre planeter?</span> </button> <ul id="toc-Findes_der_intelligent_liv_på_andre_planeter?-sublist" class="vector-toc-list"> <li id="toc-Hvordan_Jorden_udsender_radiobølger" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Hvordan_Jorden_udsender_radiobølger"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.1</span> <span>Hvordan Jorden udsender radiobølger</span> </div> </a> <ul id="toc-Hvordan_Jorden_udsender_radiobølger-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Sejlivede_rumdyr" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Sejlivede_rumdyr"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Sejlivede rumdyr</span> </div> </a> <ul id="toc-Sejlivede_rumdyr-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Rumvæsen" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Rumvæsen"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Rumvæsen</span> </div> </a> <ul id="toc-Rumvæsen-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">5</span> <span>Se også</span> </div> </a> <ul id="toc-Se_også-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Eksterne_henvisninger" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Eksterne_henvisninger"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Eksterne henvisninger</span> </div> </a> <ul id="toc-Eksterne_henvisninger-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Kilder/referencer" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Kilder/referencer"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>Kilder/referencer</span> </div> </a> <ul id="toc-Kilder/referencer-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">Udenjordisk liv</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 79 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-79" 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">79 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 badge-Q17437796 badge-featuredarticle mw-list-item" title="fremragende artikel"><a href="https://af.wikipedia.org/wiki/Buiteaardse_lewe" title="Buiteaardse lewe – afrikaans" lang="af" hreflang="af" data-title="Buiteaardse lewe" data-language-autonym="Afrikaans" data-language-local-name="afrikaans" class="interlanguage-link-target"><span>Afrikaans</span></a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%A7%D9%84%D8%AD%D9%8A%D8%A7%D8%A9_%D8%AE%D8%A7%D8%B1%D8%AC_%D8%A7%D9%84%D8%A3%D8%B1%D8%B6" title="الحياة خارج الأرض – arabisk" lang="ar" hreflang="ar" data-title="الحياة خارج الأرض" data-language-autonym="العربية" data-language-local-name="arabisk" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/Yerd%C9%99nk%C9%99nar_h%C9%99yat" title="Yerdənkənar həyat – aserbajdsjansk" lang="az" hreflang="az" data-title="Yerdənkənar həyat" data-language-autonym="Azərbaycanca" data-language-local-name="aserbajdsjansk" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-ba mw-list-item"><a href="https://ba.wikipedia.org/wiki/%D0%95%D1%80%D2%99%D3%99%D0%BD_%D1%81%D0%B8%D1%82%D1%82%D3%99%D0%B3%D0%B5_%D1%82%D0%B5%D1%80%D0%B5%D0%BA%D0%BB%D0%B5%D0%BA" title="Ерҙән ситтәге тереклек – bashkir" lang="ba" hreflang="ba" data-title="Ерҙән ситтәге тереклек" data-language-autonym="Башҡортса" data-language-local-name="bashkir" class="interlanguage-link-target"><span>Башҡортса</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%9F%D0%B0%D0%B7%D0%B0%D0%B7%D0%B5%D0%BC%D0%BD%D0%B0%D0%B5_%D0%B6%D1%8B%D1%86%D1%86%D1%91" title="Пазаземнае жыццё – belarusisk" lang="be" hreflang="be" data-title="Пазаземнае жыццё" data-language-autonym="Беларуская" data-language-local-name="belarusisk" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%98%D0%B7%D0%B2%D1%8A%D0%BD%D0%B7%D0%B5%D0%BC%D0%B5%D0%BD_%D0%B6%D0%B8%D0%B2%D0%BE%D1%82" title="Извънземен живот – bulgarsk" lang="bg" hreflang="bg" data-title="Извънземен живот" data-language-autonym="Български" data-language-local-name="bulgarsk" 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%AC%E0%A6%B9%E0%A6%BF%E0%A6%B0%E0%A7%8D%E0%A6%9C%E0%A6%BE%E0%A6%97%E0%A6%A4%E0%A6%BF%E0%A6%95_%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%BE%E0%A6%A3" title="বহির্জাগতিক প্রাণ – bengali" lang="bn" hreflang="bn" data-title="বহির্জাগতিক প্রাণ" data-language-autonym="বাংলা" data-language-local-name="bengali" 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/Buhez_arallved" title="Buhez arallved – bretonsk" lang="br" hreflang="br" data-title="Buhez arallved" data-language-autonym="Brezhoneg" data-language-local-name="bretonsk" class="interlanguage-link-target"><span>Brezhoneg</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Vida_extraterrestre" title="Vida extraterrestre – catalansk" lang="ca" hreflang="ca" data-title="Vida extraterrestre" data-language-autonym="Català" data-language-local-name="catalansk" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-ckb mw-list-item"><a href="https://ckb.wikipedia.org/wiki/%DA%98%DB%8C%D8%A7%D9%86_%D9%84%DB%95_%D8%AF%DB%95%D8%B1%DB%95%D9%88%DB%95%DB%8C_%D8%B2%DB%95%D9%88%DB%8C" title="ژیان لە دەرەوەی زەوی – sorani" lang="ckb" hreflang="ckb" data-title="ژیان لە دەرەوەی زەوی" data-language-autonym="کوردی" data-language-local-name="sorani" class="interlanguage-link-target"><span>کوردی</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Mimozemsk%C3%BD_%C5%BEivot" title="Mimozemský život – tjekkisk" lang="cs" hreflang="cs" data-title="Mimozemský život" data-language-autonym="Čeština" data-language-local-name="tjekkisk" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Au%C3%9Ferirdisches_Leben" title="Außerirdisches Leben – tysk" lang="de" hreflang="de" data-title="Außerirdisches Leben" data-language-autonym="Deutsch" data-language-local-name="tysk" 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%95%CE%BE%CF%89%CE%B3%CE%AE%CE%B9%CE%BD%CE%B7_%CE%B6%CF%89%CE%AE" title="Εξωγήινη ζωή – græsk" lang="el" hreflang="el" data-title="Εξωγήινη ζωή" data-language-autonym="Ελληνικά" data-language-local-name="græsk" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Extraterrestrial_life" title="Extraterrestrial life – engelsk" lang="en" hreflang="en" data-title="Extraterrestrial life" 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/Ekstertera_vivo" title="Ekstertera vivo – esperanto" lang="eo" hreflang="eo" data-title="Ekstertera vivo" 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/Vida_extraterrestre" title="Vida extraterrestre – spansk" lang="es" hreflang="es" data-title="Vida extraterrestre" 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/Maav%C3%A4line_elu" title="Maaväline elu – estisk" lang="et" hreflang="et" data-title="Maaväline elu" data-language-autonym="Eesti" data-language-local-name="estisk" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Bizi_estralurtar" title="Bizi estralurtar – baskisk" lang="eu" hreflang="eu" data-title="Bizi estralurtar" data-language-autonym="Euskara" data-language-local-name="baskisk" 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%AD%DB%8C%D8%A7%D8%AA_%D9%81%D8%B1%D8%A7%D8%B2%D9%85%DB%8C%D9%86%DB%8C" title="حیات فرازمینی – persisk" lang="fa" hreflang="fa" data-title="حیات فرازمینی" 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/Maan_ulkopuolinen_el%C3%A4m%C3%A4" title="Maan ulkopuolinen elämä – finsk" lang="fi" hreflang="fi" data-title="Maan ulkopuolinen elämä" 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/Vie_extraterrestre" title="Vie extraterrestre – fransk" lang="fr" hreflang="fr" data-title="Vie extraterrestre" 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/B%C3%BBtenierdsk_libben" title="Bûtenierdsk libben – vestfrisisk" lang="fy" hreflang="fy" data-title="Bûtenierdsk libben" data-language-autonym="Frysk" data-language-local-name="vestfrisisk" class="interlanguage-link-target"><span>Frysk</span></a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/Beatha_eachtardhomhanda" title="Beatha eachtardhomhanda – irsk" lang="ga" hreflang="ga" data-title="Beatha eachtardhomhanda" data-language-autonym="Gaeilge" data-language-local-name="irsk" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Vida_extraterrestre" title="Vida extraterrestre – galicisk" lang="gl" hreflang="gl" data-title="Vida extraterrestre" data-language-autonym="Galego" data-language-local-name="galicisk" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-gv mw-list-item"><a href="https://gv.wikipedia.org/wiki/Bea_neuhallooinagh" title="Bea neuhallooinagh – manx" lang="gv" hreflang="gv" data-title="Bea neuhallooinagh" data-language-autonym="Gaelg" data-language-local-name="manx" class="interlanguage-link-target"><span>Gaelg</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%97%D7%99%D7%99%D7%9D_%D7%9E%D7%97%D7%95%D7%A5_%D7%9C%D7%9B%D7%93%D7%95%D7%A8_%D7%94%D7%90%D7%A8%D7%A5" title="חיים מחוץ לכדור הארץ – hebraisk" lang="he" hreflang="he" data-title="חיים מחוץ לכדור הארץ" data-language-autonym="עברית" data-language-local-name="hebraisk" 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%AA%E0%A4%B0%E0%A4%97%E0%A5%8D%E0%A4%B0%E0%A4%B9%E0%A5%80_%E0%A4%9C%E0%A5%80%E0%A4%B5%E0%A4%A8" title="परग्रही जीवन – hindi" lang="hi" hreflang="hi" data-title="परग्रही जीवन" 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/Izvanzemaljski_%C5%BEivot" title="Izvanzemaljski život – kroatisk" lang="hr" hreflang="hr" data-title="Izvanzemaljski život" data-language-autonym="Hrvatski" data-language-local-name="kroatisk" 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/F%C3%B6ld%C3%B6n_k%C3%ADv%C3%BCli_%C3%A9let" title="Földön kívüli élet – ungarsk" lang="hu" hreflang="hu" data-title="Földön kívüli élet" data-language-autonym="Magyar" data-language-local-name="ungarsk" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-ia mw-list-item"><a href="https://ia.wikipedia.org/wiki/Vita_extraterrestre" title="Vita extraterrestre – interlingua" lang="ia" hreflang="ia" data-title="Vita extraterrestre" data-language-autonym="Interlingua" data-language-local-name="interlingua" class="interlanguage-link-target"><span>Interlingua</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Kehidupan_ekstraterestrial" title="Kehidupan ekstraterestrial – indonesisk" lang="id" hreflang="id" data-title="Kehidupan ekstraterestrial" 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-ig mw-list-item"><a href="https://ig.wikipedia.org/wiki/Nd%E1%BB%A5_nd%E1%BB%8B_%E1%BB%8Dz%E1%BB%8D" title="Ndụ ndị ọzọ – igbo" lang="ig" hreflang="ig" data-title="Ndụ ndị ọzọ" data-language-autonym="Igbo" data-language-local-name="igbo" class="interlanguage-link-target"><span>Igbo</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E5%9C%B0%E7%90%83%E5%A4%96%E7%94%9F%E5%91%BD" title="地球外生命 – japansk" lang="ja" hreflang="ja" data-title="地球外生命" 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-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/%E1%83%90%E1%83%A0%E1%83%90%E1%83%9B%E1%83%98%E1%83%AC%E1%83%98%E1%83%94%E1%83%A0%E1%83%98_%E1%83%A1%E1%83%98%E1%83%AA%E1%83%9D%E1%83%AA%E1%83%AE%E1%83%9A%E1%83%94" title="არამიწიერი სიცოცხლე – georgisk" lang="ka" hreflang="ka" data-title="არამიწიერი სიცოცხლე" data-language-autonym="ქართული" data-language-local-name="georgisk" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/%D0%91%D3%A9%D0%B3%D0%B4%D0%B5%D2%93%D0%B0%D0%BB%D0%B0%D0%BC%D0%B4%D1%8B%D2%9B_%D1%82%D1%96%D1%80%D1%88%D1%96%D0%BB%D1%96%D0%BA" title="Бөгдеғаламдық тіршілік – kasakhisk" lang="kk" hreflang="kk" data-title="Бөгдеғаламдық тіршілік" data-language-autonym="Қазақша" data-language-local-name="kasakhisk" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-km mw-list-item"><a href="https://km.wikipedia.org/wiki/%E1%9E%87%E1%9E%B8%E1%9E%9C%E1%9E%B7%E1%9E%8F%E1%9E%80%E1%9F%92%E1%9E%9A%E1%9F%85%E1%9E%97%E1%9E%96" title="ជីវិតក្រៅភព – khmer" lang="km" hreflang="km" data-title="ជីវិតក្រៅភព" data-language-autonym="ភាសាខ្មែរ" data-language-local-name="khmer" class="interlanguage-link-target"><span>ភាសាខ្មែរ</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%99%B8%EA%B3%84%EC%83%9D%EB%AA%85" title="외계생명 – koreansk" lang="ko" hreflang="ko" data-title="외계생명" data-language-autonym="한국어" data-language-local-name="koreansk" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-ks mw-list-item"><a href="https://ks.wikipedia.org/wiki/%D9%86%DB%8C%D9%9A%D8%A8%D9%95%D8%B1_%D8%A2%D8%B3%D9%85%D8%A3%D9%86%D8%A0_%D8%A8%D9%84%D8%A3%DB%92" title="نیٚبٕر آسمأنؠ بلأے – kashmiri" lang="ks" hreflang="ks" data-title="نیٚبٕر آسمأنؠ بلأے" data-language-autonym="कॉशुर / کٲشُر" data-language-local-name="kashmiri" class="interlanguage-link-target"><span>कॉशुर / کٲشُر</span></a></li><li class="interlanguage-link interwiki-la mw-list-item"><a href="https://la.wikipedia.org/wiki/Vita_extranea" title="Vita extranea – latin" lang="la" hreflang="la" data-title="Vita extranea" data-language-autonym="Latina" data-language-local-name="latin" class="interlanguage-link-target"><span>Latina</span></a></li><li class="interlanguage-link interwiki-lfn mw-list-item"><a href="https://lfn.wikipedia.org/wiki/Viventes_estrateran" title="Viventes estrateran – Lingua Franca Nova" lang="lfn" hreflang="lfn" data-title="Viventes estrateran" data-language-autonym="Lingua Franca Nova" data-language-local-name="Lingua Franca Nova" class="interlanguage-link-target"><span>Lingua Franca Nova</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Ne%C5%BEemi%C5%A1ka_gyvyb%C4%97" title="Nežemiška gyvybė – litauisk" lang="lt" hreflang="lt" data-title="Nežemiška gyvybė" data-language-autonym="Lietuvių" data-language-local-name="litauisk" 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/%C4%80rpuszemes_dz%C4%ABv%C4%ABba" title="Ārpuszemes dzīvība – lettisk" lang="lv" hreflang="lv" data-title="Ārpuszemes dzīvība" data-language-autonym="Latviešu" data-language-local-name="lettisk" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-mg mw-list-item"><a href="https://mg.wikipedia.org/wiki/Fiainana_ivelan-tany" title="Fiainana ivelan-tany – malagassisk" lang="mg" hreflang="mg" data-title="Fiainana ivelan-tany" data-language-autonym="Malagasy" data-language-local-name="malagassisk" class="interlanguage-link-target"><span>Malagasy</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%92%D0%BE%D0%BD%D0%B7%D0%B5%D0%BC%D1%81%D0%BA%D0%B8_%D0%B6%D0%B8%D0%B2%D0%BE%D1%82" title="Вонземски живот – makedonsk" lang="mk" hreflang="mk" data-title="Вонземски живот" data-language-autonym="Македонски" data-language-local-name="makedonsk" 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%85%E0%B4%A8%E0%B5%8D%E0%B4%AF%E0%B4%97%E0%B5%8D%E0%B4%B0%E0%B4%B9%E0%B4%9C%E0%B5%80%E0%B4%B5%E0%B5%BB" title="അന്യഗ്രഹജീവൻ – malayalam" lang="ml" hreflang="ml" data-title="അന്യഗ്രഹജീവൻ" data-language-autonym="മലയാളം" data-language-local-name="malayalam" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-mn mw-list-item"><a href="https://mn.wikipedia.org/wiki/%D0%A5%D0%B0%D1%80%D1%8C_%D0%B3%D0%B0%D1%80%D0%B0%D0%B3%D0%B8%D0%B9%D0%BD_%D1%81%D0%BE%D1%91%D0%BB_%D0%B8%D1%80%D0%B3%D1%8D%D0%BD%D1%88%D0%B8%D0%BB" title="Харь гарагийн соёл иргэншил – mongolsk" lang="mn" hreflang="mn" data-title="Харь гарагийн соёл иргэншил" data-language-autonym="Монгол" data-language-local-name="mongolsk" class="interlanguage-link-target"><span>Монгол</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Makhluk_luar_angkasa" title="Makhluk luar angkasa – malajisk" lang="ms" hreflang="ms" data-title="Makhluk luar angkasa" 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-my mw-list-item"><a href="https://my.wikipedia.org/wiki/%E1%80%82%E1%80%BC%E1%80%AD%E1%80%AF%E1%80%9F%E1%80%BA%E1%80%9E%E1%80%AC%E1%80%B8" title="ဂြိုဟ်သား – burmesisk" lang="my" hreflang="my" data-title="ဂြိုဟ်သား" data-language-autonym="မြန်မာဘာသာ" data-language-local-name="burmesisk" class="interlanguage-link-target"><span>မြန်မာဘာသာ</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Buitenaards_leven" title="Buitenaards leven – nederlandsk" lang="nl" hreflang="nl" data-title="Buitenaards leven" data-language-autonym="Nederlands" data-language-local-name="nederlandsk" 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/Utanomjordisk_liv" title="Utanomjordisk liv – nynorsk" lang="nn" hreflang="nn" data-title="Utanomjordisk liv" data-language-autonym="Norsk nynorsk" data-language-local-name="nynorsk" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-oc mw-list-item"><a href="https://oc.wikipedia.org/wiki/Vida_extraterr%C3%A8stra" title="Vida extraterrèstra – occitansk" lang="oc" hreflang="oc" data-title="Vida extraterrèstra" data-language-autonym="Occitan" data-language-local-name="occitansk" class="interlanguage-link-target"><span>Occitan</span></a></li><li class="interlanguage-link interwiki-pcm mw-list-item"><a href="https://pcm.wikipedia.org/wiki/Extraterrestrial_laif" title="Extraterrestrial laif – nigeriansk pidgin" lang="pcm" hreflang="pcm" data-title="Extraterrestrial laif" data-language-autonym="Naijá" data-language-local-name="nigeriansk pidgin" class="interlanguage-link-target"><span>Naijá</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/%C5%BBycie_pozaziemskie" title="Życie pozaziemskie – polsk" lang="pl" hreflang="pl" data-title="Życie pozaziemskie" data-language-autonym="Polski" data-language-local-name="polsk" 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%AE%D9%84%D8%A7%D8%A6%DB%8C_%D9%85%D8%AE%D9%84%D9%88%D9%82" title="خلائی مخلوق – Western Punjabi" lang="pnb" hreflang="pnb" data-title="خلائی مخلوق" data-language-autonym="پنجابی" data-language-local-name="Western Punjabi" class="interlanguage-link-target"><span>پنجابی</span></a></li><li class="interlanguage-link interwiki-ps mw-list-item"><a href="https://ps.wikipedia.org/wiki/%D9%84%D9%87_%D9%86%DA%93%DB%8D_%DA%85%D8%AE%D9%87_%D8%AF_%D8%A8%D8%A7%D9%86%D8%AF%DB%90_%DA%98%D9%88%D9%86%D8%AF" title="له نړۍ څخه د باندې ژوند – pashto" lang="ps" hreflang="ps" data-title="له نړۍ څخه د باندې ژوند" data-language-autonym="پښتو" data-language-local-name="pashto" class="interlanguage-link-target"><span>پښتو</span></a></li><li class="interlanguage-link interwiki-pt badge-Q17437798 badge-goodarticle mw-list-item" title="god artikel"><a href="https://pt.wikipedia.org/wiki/Vida_extraterrestre" title="Vida extraterrestre – portugisisk" lang="pt" hreflang="pt" data-title="Vida extraterrestre" 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/Via%C8%9B%C4%83_extraterestr%C4%83" title="Viață extraterestră – rumænsk" lang="ro" hreflang="ro" data-title="Viață extraterestră" 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%92%D0%BD%D0%B5%D0%B7%D0%B5%D0%BC%D0%BD%D0%B0%D1%8F_%D0%B6%D0%B8%D0%B7%D0%BD%D1%8C" title="Внеземная жизнь – russisk" lang="ru" hreflang="ru" data-title="Внеземная жизнь" data-language-autonym="Русский" data-language-local-name="russisk" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-si mw-list-item"><a href="https://si.wikipedia.org/wiki/%E0%B6%B4%E0%B7%92%E0%B6%A7%E0%B7%83%E0%B6%9A%E0%B7%8A%E0%B7%80%E0%B6%BD_%E0%B6%A2%E0%B7%93%E0%B7%80%E0%B7%93%E0%B6%B1%E0%B7%8A" title="පිටසක්වල ජීවීන් – singalesisk" lang="si" hreflang="si" data-title="පිටසක්වල ජීවීන්" data-language-autonym="සිංහල" data-language-local-name="singalesisk" class="interlanguage-link-target"><span>සිංහල</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Extraterrestrial_life" title="Extraterrestrial life – Simple English" lang="en-simple" hreflang="en-simple" data-title="Extraterrestrial life" 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/Mimozemsk%C3%BD_%C5%BEivot" title="Mimozemský život – slovakisk" lang="sk" hreflang="sk" data-title="Mimozemský život" data-language-autonym="Slovenčina" data-language-local-name="slovakisk" 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/Nezemeljsko_%C5%BEivljenje" title="Nezemeljsko življenje – slovensk" lang="sl" hreflang="sl" data-title="Nezemeljsko življenje" data-language-autonym="Slovenščina" data-language-local-name="slovensk" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-sq mw-list-item"><a href="https://sq.wikipedia.org/wiki/Jeta_jasht%C3%ABtok%C3%ABsore" title="Jeta jashtëtokësore – albansk" lang="sq" hreflang="sq" data-title="Jeta jashtëtokësore" data-language-autonym="Shqip" data-language-local-name="albansk" class="interlanguage-link-target"><span>Shqip</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%92%D0%B0%D0%BD%D0%B7%D0%B5%D0%BC%D0%B0%D1%99%D1%81%D0%BA%D0%B8_%D0%B6%D0%B8%D0%B2%D0%BE%D1%82" title="Ванземаљски живот – serbisk" lang="sr" hreflang="sr" data-title="Ванземаљски живот" data-language-autonym="Српски / srpski" data-language-local-name="serbisk" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-stq mw-list-item"><a href="https://stq.wikipedia.org/wiki/Buuten%C3%A4idsk_Lieuwend" title="Buutenäidsk Lieuwend – Saterland Frisian" lang="stq" hreflang="stq" data-title="Buutenäidsk Lieuwend" data-language-autonym="Seeltersk" data-language-local-name="Saterland Frisian" class="interlanguage-link-target"><span>Seeltersk</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Utomjordiskt_liv" title="Utomjordiskt liv – svensk" lang="sv" hreflang="sv" data-title="Utomjordiskt liv" data-language-autonym="Svenska" data-language-local-name="svensk" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%B5%E0%AF%87%E0%AE%B1%E0%AF%8D%E0%AE%B1%E0%AF%81%E0%AE%B2%E0%AE%95_%E0%AE%89%E0%AE%AF%E0%AE%BF%E0%AE%B0%E0%AE%BF" title="வேற்றுலக உயிரி – tamil" lang="ta" hreflang="ta" data-title="வேற்றுலக உயிரி" data-language-autonym="தமிழ்" data-language-local-name="tamil" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-te mw-list-item"><a href="https://te.wikipedia.org/wiki/%E0%B0%97%E0%B1%8D%E0%B0%B0%E0%B0%B9%E0%B0%BE%E0%B0%82%E0%B0%A4%E0%B0%B0_%E0%B0%B5%E0%B0%BE%E0%B0%B8%E0%B1%81%E0%B0%B2%E0%B1%81" title="గ్రహాంతర వాసులు – telugu" lang="te" hreflang="te" data-title="గ్రహాంతర వాసులు" data-language-autonym="తెలుగు" data-language-local-name="telugu" class="interlanguage-link-target"><span>తెలుగు</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B8%AA%E0%B8%B4%E0%B9%88%E0%B8%87%E0%B8%A1%E0%B8%B5%E0%B8%8A%E0%B8%B5%E0%B8%A7%E0%B8%B4%E0%B8%95%E0%B8%99%E0%B8%AD%E0%B8%81%E0%B9%82%E0%B8%A5%E0%B8%81" title="สิ่งมีชีวิตนอกโลก – thai" lang="th" hreflang="th" data-title="สิ่งมีชีวิตนอกโลก" 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/D%C3%BCnya_d%C4%B1%C5%9F%C4%B1_ya%C5%9Fam" title="Dünya dışı yaşam – tyrkisk" lang="tr" hreflang="tr" data-title="Dünya dışı yaşam" data-language-autonym="Türkçe" data-language-local-name="tyrkisk" 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/%D2%96%D0%B8%D1%80%D0%B4%D3%99%D0%BD_%D1%87%D0%B8%D1%82%D1%82%D3%99%D0%B3%D0%B5_%D1%82%D0%B5%D1%80%D0%B5%D0%BA%D0%BB%D0%B5%D0%BA" title="Җирдән читтәге тереклек – tatarisk" lang="tt" hreflang="tt" data-title="Җирдән читтәге тереклек" data-language-autonym="Татарча / tatarça" data-language-local-name="tatarisk" 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%9F%D0%BE%D0%B7%D0%B0%D0%B7%D0%B5%D0%BC%D0%BD%D0%B5_%D0%B6%D0%B8%D1%82%D1%82%D1%8F" title="Позаземне життя – ukrainsk" lang="uk" hreflang="uk" data-title="Позаземне життя" 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%AE%D9%84%D8%A7%D8%A6%DB%8C_%D9%85%D8%AE%D9%84%D9%88%D9%82" title="خلائی مخلوق – urdu" lang="ur" hreflang="ur" data-title="خلائی مخلوق" 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/O%CA%BBzga_sayyoraliklar" title="Oʻzga sayyoraliklar – usbekisk" lang="uz" hreflang="uz" data-title="Oʻzga sayyoraliklar" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="usbekisk" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/S%E1%BB%B1_s%E1%BB%91ng_ngo%C3%A0i_Tr%C3%A1i_%C4%90%E1%BA%A5t" title="Sự sống ngoài Trái Đất – vietnamesisk" lang="vi" hreflang="vi" data-title="Sự sống ngoài Trái Đất" data-language-autonym="Tiếng Việt" data-language-local-name="vietnamesisk" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link 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accesskey="g"><span>Wikidata-element</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Sideværktøjer"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Udseende"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Udseende</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">flyt til sidebjælken</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">skjul</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">Fra Wikipedia, 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"><dl><dd><span typeof="mw:File"><span><img src="//upload.wikimedia.org/wikipedia/commons/thumb/6/61/Searchtool.svg/19px-Searchtool.svg.png" decoding="async" width="19" height="19" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/61/Searchtool.svg/29px-Searchtool.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/61/Searchtool.svg/38px-Searchtool.svg.png 2x" data-file-width="512" data-file-height="512" /></span></span> <i>Denne artikel bør gennemlæses af en person med fagkendskab for at sikre den faglige korrekthed.</i></dd></dl> <p><b>Udenjordisk liv</b> er defineret, som <a href="/wiki/Liv" title="Liv">liv</a> som ikke har oprindelse fra <a href="/wiki/Planet" title="Planet">planeten</a> <a href="/wiki/Jorden" title="Jorden">jorden</a>. Eksistensen af sådant liv er teoretisk og alle påstande om udenjordisk liv er indtil videre omstridte. Videnskaben om udenjordisk liv betegnes som <a href="/wiki/Astrobiologi" title="Astrobiologi">astrobiologi</a> eller eksobiologi. </p><p>Spørgsmålet om udenjordisk liv kan opdeles: </p> <ol><li>Findes der liv på andre planeter inkl. <a href="/wiki/Exoplanet" title="Exoplanet">exoplaneter</a>?</li> <li>Findes der <a href="/wiki/Intelligent" class="mw-redirect" title="Intelligent">intelligent</a> liv på andre planeter</li></ol> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Findes_der_liv_på_andre_planeter?"><span id="Findes_der_liv_p.C3.A5_andre_planeter.3F"></span>Findes der liv på andre planeter?</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Udenjordisk_liv&veaction=edit&section=1" title="Redigér afsnit: Findes der liv på andre planeter?" class="mw-editsection-visualeditor"><span>redigér</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Udenjordisk_liv&action=edit&section=1" title="Edit section's source code: Findes der liv på andre planeter?"><span>rediger kildetekst</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Fil:ALH84001_structures.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a8/ALH84001_structures.jpg/220px-ALH84001_structures.jpg" decoding="async" width="220" height="150" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a8/ALH84001_structures.jpg/330px-ALH84001_structures.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a8/ALH84001_structures.jpg/440px-ALH84001_structures.jpg 2x" data-file-width="1983" data-file-height="1351" /></a><figcaption>Strukturer i <a href="/wiki/Meteorit" title="Meteorit">meteoritten</a> <a href="/wiki/Allan_Hills_84001" title="Allan Hills 84001">ALH84001</a>, der muligvis er forsteninger af bakterielignende liv på <a href="/wiki/Mars_(planet)" title="Mars (planet)">Mars</a></figcaption></figure> <p>Man <sup class="noprint Inline-Template" style="white-space:nowrap;">[<i><a href="/wiki/Kategori:Artikler_hvor_enkelte_passager_beh%C3%B8ver_uddybning" title="Kategori:Artikler hvor enkelte passager behøver uddybning"><span title="Tekst i omegnen af dette mærke behøver uddybning eller fjernelse af specialjargon (siden 2015)">hvem?</span></a></i>]</sup> forventer at flydende <a href="/wiki/Vand" title="Vand">vand</a> er en forudsætning for liv. Vand er et simpelt stof, der består af to ganske hyppigt forekommende <a href="/wiki/Grundstof" title="Grundstof">grundstoffer</a>, <a href="/wiki/Brint" title="Brint">brint</a> og <a href="/wiki/Ilt" title="Ilt">ilt</a>, så vandmolekyler eksisterer mange steder i <a href="/wiki/Universet" title="Universet">universet</a>. Der kræves blot en passende <a href="/wiki/Temperatur" title="Temperatur">temperatur</a> og et passende <a href="/wiki/Tryk_(fysik)" title="Tryk (fysik)">tryk</a> for at opfylde kravet om flydende vand; dette begrænser søgningen til et bælte, “<a href="/wiki/Den_beboelige_zone" title="Den beboelige zone">den beboelige zone</a>”, i en bestemt afstand om <a href="/wiki/Stjerne" title="Stjerne">stjerner</a>, samt evt. andre steder hvor særlige forhold kan give en passende temperatur. Har der eksisteret flydende vand, der har fostret liv, kan <a href="/wiki/Extremofil" class="mw-redirect" title="Extremofil">extremofile</a> organismer muligvis overleve i særlige <a href="/wiki/Niche_(%C3%B8kologi)" title="Niche (økologi)">nicher</a> på en planet, der ellers mangler vand – dette har man håbet at finde på <a href="/wiki/Mars_(planet)" title="Mars (planet)">Mars</a>, men endnu uden held. Man har dog fundet <a href="/wiki/Is" title="Is">is</a> på Mars, og muligvis også flydende vand under overfladen,<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> derfor er chancen for liv på Mars stadig mulig længere inde i planeten, som f.ex. i <a href="/wiki/Lavatunnel" title="Lavatunnel">lavatunneller</a>.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </p><p>Andre krav kan muligvis være tilstedeværelse af en <a href="/wiki/Atmosf%C3%A6re_(himmellegeme)" title="Atmosfære (himmellegeme)">atmosfære</a> samt et ikke for højt niveau af <a href="/wiki/Kosmisk_str%C3%A5ling" title="Kosmisk stråling">kosmisk stråling</a> – hvilket kan udelukke store dele af <a href="/wiki/Galakse" title="Galakse">galakserne</a>, hvor <a href="/wiki/Str%C3%A5ling" title="Stråling">strålingen</a> er for kraftig til at komplekse <a href="/wiki/Molekyle" title="Molekyle">molekyler</a> kan eksistere. </p><p>Mange kemiske molekyler, som kan øge sandsynligheden for udenjordisk liv, er fundet. <sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> <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> <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> <sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Findes_der_intelligent_liv_på_andre_planeter?"><span id="Findes_der_intelligent_liv_p.C3.A5_andre_planeter.3F"></span>Findes der intelligent liv på andre planeter?</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Udenjordisk_liv&veaction=edit&section=2" title="Redigér afsnit: Findes der intelligent liv på andre planeter?" class="mw-editsection-visualeditor"><span>redigér</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Udenjordisk_liv&action=edit&section=2" title="Edit section's source code: Findes der intelligent liv på andre planeter?"><span>rediger kildetekst</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Fil:The_Sounds_of_Earth_Record_Cover_-_GPN-2000-001978.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/5/56/The_Sounds_of_Earth_Record_Cover_-_GPN-2000-001978.jpg/220px-The_Sounds_of_Earth_Record_Cover_-_GPN-2000-001978.jpg" decoding="async" width="220" height="220" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/56/The_Sounds_of_Earth_Record_Cover_-_GPN-2000-001978.jpg/330px-The_Sounds_of_Earth_Record_Cover_-_GPN-2000-001978.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/56/The_Sounds_of_Earth_Record_Cover_-_GPN-2000-001978.jpg/440px-The_Sounds_of_Earth_Record_Cover_-_GPN-2000-001978.jpg 2x" data-file-width="2215" data-file-height="2215" /></a><figcaption>Coveret til pladen <i>The Sounds of Earth</i>, der blev sendt ud i rummet med <a href="/wiki/Voyager" title="Voyager">Voyagerrumsonderne</a> for – om muligt – at give udenjordisk liv et indblik i Jordens lyde.</figcaption></figure> <p>Et af <a href="/wiki/Videnskab" title="Videnskab">videnskabens</a> store spørgsmål er, om der er intelligent <a href="/wiki/Liv" title="Liv">liv</a> andre steder end på <a href="/wiki/Jorden" title="Jorden">Jorden</a>. Da man allerede kender én planet med intelligent liv, stilles der spørgsmålstegn ved hvorfor der ikke skulle være flere. Ifølge dette synspunkt er spørgsmålet snarere, hvor almindeligt eller ualmindeligt det er, end hvorvidt det findes, jævnfør <a href="/wiki/Drakes_ligning" title="Drakes ligning">Drakes ligning</a>. </p><p>Hvis der er andre end os, som kan tænke og tale, vil det formentlig være umuligt for os at opdage det indenfor en rimelig tid, med mindre de udsender <a href="/wiki/Radiob%C3%B8lger" title="Radiobølger">radiobølger</a>, da <a href="/wiki/Universet" title="Universet">universet</a> er så stort, at det ville tage årtusinder blot at rejse fysisk ud til de nærmeste <a href="/wiki/Stjerne_(astronomi)" class="mw-redirect" title="Stjerne (astronomi)">stjerner</a> med den nuværende <a href="/wiki/Interstellar_rejse" title="Interstellar rejse">interstellare rejseteknologi</a>. Selv disse signaler, bevæger sig "kun" med <a href="/wiki/Lysets_hastighed" title="Lysets hastighed">lysets hastighed</a>, så reelt er der grænser for hvor stor en del af universet vi kan <a href="/wiki/Kommunikere" class="mw-redirect" title="Kommunikere">kommunikere</a> med, selv over perioder på årtier eller århundreder.<sup class="Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Kildeangivelser" title="Wikipedia:Kildeangivelser"><span title="Dette udsagn mangler reference til pålidelige kilder. (siden februar 2015)">kilde mangler</span></a></i>]</sup> </p><p>Man kan med sikkerhed sige, at der er ét sted i galaksen <a href="/wiki/M%C3%A6lkevejen" title="Mælkevejen">Mælkevejen</a>, nemlig på Jorden, hvor intelligente væsener har udviklet en <a href="/wiki/Teknik" title="Teknik">teknik</a>, der gør dem i stand til at udsende radiosignaler. Det er derfor en mulighed, at en lignende udvikling har fundet sted et andet sted i <a href="/wiki/M%C3%A6lkevejen" title="Mælkevejen">Mælkevejen</a> eller i de andre galakser i <a href="/wiki/Universet" title="Universet">universet</a>.<sup class="Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Kildeangivelser" title="Wikipedia:Kildeangivelser"><span title="Dette udsagn mangler reference til pålidelige kilder. (siden februar 2015)">kilde mangler</span></a></i>]</sup> </p><p>Man kan forsøge at lave beregninger over, hvor stor sandsynligheden er for, at en stjerne i mælkevejen er ligesom <a href="/wiki/Solen" title="Solen">solen</a> og at en planet og dens <a href="/wiki/M%C3%A5ne" title="Måne">måne</a> er ligesom Jorden og <a href="/wiki/M%C3%A5nen" title="Månen">månen</a>, men usikkerhederne er så store, at resultatet ikke giver mening. Fordi ingen stjerne er 100% magen til stjernen <a href="/wiki/Solen" title="Solen">solen</a> i alder, størrelse og <a href="/wiki/Grundstof" title="Grundstof">grundstofsammensætning</a>, og vores <a href="/wiki/Viden" title="Viden">viden</a> om dannelsen af planeter er begrænset, er det svært at udtale sig om, hvor meget stjernen kan afvige fra solen og stadig have en jordlignende planet.<sup class="Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Kildeangivelser" title="Wikipedia:Kildeangivelser"><span title="Dette udsagn mangler reference til pålidelige kilder. (siden februar 2015)">kilde mangler</span></a></i>]</sup> </p> <div class="mw-heading mw-heading3"><h3 id="Hvordan_Jorden_udsender_radiobølger"><span id="Hvordan_Jorden_udsender_radiob.C3.B8lger"></span>Hvordan Jorden udsender radiobølger</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Udenjordisk_liv&veaction=edit&section=3" title="Redigér afsnit: Hvordan Jorden udsender radiobølger" class="mw-editsection-visualeditor"><span>redigér</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Udenjordisk_liv&action=edit&section=3" title="Edit section's source code: Hvordan Jorden udsender radiobølger"><span>rediger kildetekst</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>De fleste radiokilder på jorden er punktformede, og bliver derfor svagere jo længere man kommer fra dem. Men vi sender også <a href="/wiki/TV" class="mw-redirect" title="TV">TV</a>-signaler via <a href="/wiki/Satellit" title="Satellit">satellitter</a> for at rette dem mod jorden. Da jorden bevæger sig og satellitten bevæger sig så spredes signalet i en vifte ud i rummet og dem som opfanger signalerne, vil kun høre et halvt bib eller to bib bib. Og tilsvarende vil vi fra jorden kun kunne opfange et halvt bib eller to bib bib, fra et fremmed sted i rummet. </p><p>Mennesker søger systematisk efter radiosignaler fra andre steder i universet (f.eks. <a href="/wiki/Planet" title="Planet">planeter</a>), der kan indikere intelligent liv. Dette sker bl.a. via det såkaldte <a href="/wiki/SETI" title="SETI">SETI</a>-projekt </p> <div class="mw-heading mw-heading2"><h2 id="Sejlivede_rumdyr">Sejlivede rumdyr</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Udenjordisk_liv&veaction=edit&section=4" title="Redigér afsnit: Sejlivede rumdyr" class="mw-editsection-visualeditor"><span>redigér</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Udenjordisk_liv&action=edit&section=4" title="Edit section's source code: Sejlivede rumdyr"><span>rediger kildetekst</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Her er nogle dyr som i dvalefase kan tåle at være i rummet:<sup class="Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Kildeangivelser" title="Wikipedia:Kildeangivelser"><span title="Dette udsagn mangler reference til pålidelige kilder. (siden Uge 50, 2008)">kilde mangler</span></a></i>]</sup> </p> <ul><li><a href="/wiki/Bj%C3%B8rnedyr" title="Bjørnedyr">Bjørnedyr</a></li> <li>Nogle <a href="/wiki/Bakterie" class="mw-redirect" title="Bakterie">bakterier</a> og <a href="/wiki/Mikrobe" class="mw-redirect" title="Mikrobe">mikrober</a><sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-11" class="reference"><a href="#cite_note-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-12" class="reference"><a href="#cite_note-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-13" class="reference"><a href="#cite_note-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-14" class="reference"><a href="#cite_note-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-15" class="reference"><a href="#cite_note-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup></li></ul> <ul><li><a href="/wiki/Salts%C3%B8krebs" title="Saltsøkrebs">Saltsøkrebs</a> (måske kan de tåle dyb nedfrysning i embryostadiet?)</li> <li><a href="/wiki/Triops" title="Triops">Triops</a>, <a href="/wiki/Damrokke" class="mw-redirect" title="Damrokke">damrokke</a> – kan ligge i udtørret <a href="/wiki/Embryo" class="mw-redirect" title="Embryo">embryofase</a> i mindst 27 år</li> <li><a href="/wiki/Lav_(symbiotisk_organisme)" title="Lav (symbiotisk organisme)">Lav (symbiotisk organisme)</a><sup id="cite_ref-16" class="reference"><a href="#cite_note-16"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-17" class="reference"><a href="#cite_note-17"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-18" class="reference"><a href="#cite_note-18"><span class="cite-bracket">[</span>18<span class="cite-bracket">]</span></a></sup></li></ul> <p>Disse dyr klarer sig bedre i laboratorier i rummet end på jorden: </p> <ul><li><a href="/wiki/Caenorhabditis_elegans" title="Caenorhabditis elegans">Caenorhabditis elegans</a><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></li></ul> <div class="mw-heading mw-heading2"><h2 id="Rumvæsen"><span id="Rumv.C3.A6sen"></span>Rumvæsen</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Udenjordisk_liv&veaction=edit&section=5" title="Redigér afsnit: Rumvæsen" class="mw-editsection-visualeditor"><span>redigér</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Udenjordisk_liv&action=edit&section=5" title="Edit section's source code: Rumvæsen"><span>rediger kildetekst</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Fil:Ufo_museum,_diyarbakir2.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/b/b2/Ufo_museum%2C_diyarbakir2.jpg/170px-Ufo_museum%2C_diyarbakir2.jpg" decoding="async" width="170" height="227" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/b2/Ufo_museum%2C_diyarbakir2.jpg/255px-Ufo_museum%2C_diyarbakir2.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/b2/Ufo_museum%2C_diyarbakir2.jpg/340px-Ufo_museum%2C_diyarbakir2.jpg 2x" data-file-width="1200" data-file-height="1600" /></a><figcaption>Populær opfattelse af et "rumvæsen", her udstillet på UFO-museum.</figcaption></figure> <p>Et rumvæsen er et ikke<a href="/wiki/Jorden" title="Jorden">jordisk</a> intelligens<a href="/w/index.php?title=V%C3%A6sen_(levende)&action=edit&redlink=1" class="new" title="Væsen (levende) (ikke skrevet endnu)">væsen</a>, der formodes at leve på andre <a href="/wiki/Planet" title="Planet">planeter</a> andre steder i <a href="/wiki/Universet" title="Universet">universet</a>. Der er endnu ikke opnået nogen form for kontakt med disse væsener, men i <a href="/wiki/Fiktion" title="Fiktion">fiktion</a> (primært <a href="/wiki/Science_fiction" title="Science fiction">science fiction</a>) og <a href="/wiki/Popul%C3%A6rkultur" title="Populærkultur">populærkultur</a> findes der forskellige bud på, hvordan et rumvæsen ser ud. Alt sammen baseret på fri fantasi og de mange <a href="/wiki/Ufo_(objekt)" class="mw-redirect" title="Ufo (objekt)">ufo</a>-observationer, som p.t. ikke har kunnet forklares på traditionel vis. Nogle mennesker mener at rumvæsner har besøgt Jorden gennem flere tusinde år. </p><p>Det klassiske grå rumvæsen, er et fænomen i ufolitteraturen og <a href="/wiki/Konspirationsteori" title="Konspirationsteori">konspirationsteorier</a>. De har et stort <a href="/wiki/Ballon" title="Ballon">ballonformet</a> hoved med to store glatte <a href="/wiki/%C3%98je" title="Øje">øjne</a> og en <a href="/wiki/Gr%C3%A5" title="Grå">grå</a> hudfarve. De er meget tynde og har kun tre-fire <a href="/wiki/Finger" title="Finger">fingre</a> eller <a href="/wiki/T%C3%A5" title="Tå">tæer</a> på hvert lem. </p><p>Der er fra tid til anden fundet forskellige <a href="/wiki/Skelet" title="Skelet">skeletter</a> og andre rester af mennesker og menneskelignede væsner, som ifølge diverse konspirationsteorier og/eller spekulative teorier skulle være rester af rumvæsner. Som eksempler herpå er <a href="/wiki/Atacama-humanoiden" title="Atacama-humanoiden">Atacama-humanoiden</a>, <a href="/wiki/Dv%C3%A6rgmumien_fra_Wyoming" title="Dværgmumien fra Wyoming">Dværgmumien fra Wyoming</a> og fundet af den såkaldte <a href="/wiki/Starchild_skull" title="Starchild skull">Starchild skull</a>. </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=Udenjordisk_liv&veaction=edit&section=6" 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=Udenjordisk_liv&action=edit&section=6" 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/Biosignatur" title="Biosignatur">Biosignatur</a></li> <li><a href="/wiki/Den_beboelige_zone" title="Den beboelige zone">Den beboelige zone</a></li> <li><a href="/wiki/Drakes_ligning" title="Drakes ligning">Drakes ligning</a></li> <li><a href="/wiki/Eksobiologi" class="mw-redirect" title="Eksobiologi">Eksobiologi</a></li> <li><a href="/wiki/Exoplanet" title="Exoplanet">Exoplanet</a></li> <li><a href="/wiki/Hachimoji_DNA" title="Hachimoji DNA">Hachimoji DNA</a></li> <li><a href="/wiki/Universet" title="Universet">Universet</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Eksterne_henvisninger">Eksterne henvisninger</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Udenjordisk_liv&veaction=edit&section=7" title="Redigér afsnit: Eksterne henvisninger" class="mw-editsection-visualeditor"><span>redigér</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Udenjordisk_liv&action=edit&section=7" title="Edit section's source code: Eksterne henvisninger"><span>rediger kildetekst</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a rel="nofollow" class="external text" href="http://videnskab.dk/content/dk/temaer/tema_liv">Videnskab.dks tværvidenskabelige tema om Liv</a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20090525173825/http://videnskab.dk/content/dk/temaer/tema_liv">Arkiveret</a> 25. maj 2009 hos <a href="/wiki/Wayback_Machine" title="Wayback Machine">Wayback Machine</a></li> <li><a rel="nofollow" class="external text" href="http://www.livescience.com/48173-aliens-may-be-out-there-but-too-distant-for-contact.html">Aliens May Be Out There, But Too Distant For Contact. Livescience</a></li> <li><a rel="nofollow" class="external text" href="https://www.sciencedaily.com/releases/2003/10/031031063656.htm">Science Daily: 2003-10-31, Scientists Find Evolution Of Life Helped Keep Earth Habitable</a></li> <li><a rel="nofollow" class="external text" href="http://news.bbc.co.uk/1/hi/sci/tech/3305503.stm">10 December, 2003, BBCNews: Inter-world life transport argued</a> Citat: "...This means, they claim, that life must be widespread throughout our star system and that it is unlikely to have originated on Earth...."</li> <li><a rel="nofollow" class="external text" href="http://news.bbc.co.uk/1/hi/sci/tech/2985345.stm">30 April, 2003, BBCNews: Why we are not like ET</a></li> <li><a rel="nofollow" class="external text" href="http://news.bbc.co.uk/1/hi/sci/tech/3746583.stm">25 May, 2004, BBC News: Venus clouds 'might harbour life'</a> Citat: "...But <a href="/wiki/Mikrobe" class="mw-redirect" title="Mikrobe">microbes</a> could survive and reproduce, experts say, floating in the thick, cloudy <a href="/wiki/Atmosf%C3%A6re_(himmellegeme)" title="Atmosfære (himmellegeme)">atmosphere</a>, protected by a sunscreen of <a href="/wiki/Svovl" title="Svovl">sulphur</a> compounds..."</li></ul> <div class="mw-heading mw-heading2"><h2 id="Kilder/referencer"><span id="Kilder.2Freferencer"></span>Kilder/referencer</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Udenjordisk_liv&veaction=edit&section=8" title="Redigér afsnit: Kilder/referencer" class="mw-editsection-visualeditor"><span>redigér</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Udenjordisk_liv&action=edit&section=8" title="Edit section's source code: Kilder/referencer"><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 mw-references-columns"><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/mars-lakes-possible-underground-south-pole"><i>Mars may have dozens of lakes beneath its south pole</i>, space.com, 28. juni 2021</a></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><a href="#cite_ref-2">^</a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="https://www.universetoday.com/146903/why-lava-tubes-should-be-our-top-exploration-priority-on-other-worlds/#google_vignette">Why Lava Tubes Should be Our Top Exploration Priority on Other Worlds. Universe Today 2020</a></span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><a href="#cite_ref-3">^</a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://www.newscientist.com/news/news.jsp?id=ns99994634">04.02.2004, New Scientist</a> Oxygen og carbon i atmosfæren hos den eneste exoplanet der er kendt for at have en atmosfære.</span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><a href="#cite_ref-4">^</a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="https://ing.dk/artikel/55140">17.01.2004, Ing.dk: Gigantisk hale af kulstof efter komet</a><small> (<a href="/wiki/Wikipedia:Artikler_med_d%C3%B8de_eksterne_henvisninger" title="Wikipedia:Artikler med døde eksterne henvisninger">Webside ikke længere tilgængelig</a>)</small> Citat: "...Sammenholdt med tidligere resultater viser det, at betingelserne for, at liv kan opstå på planeter omkring andre stjerner, findes..."</span> </li> <li id="cite_note-5"><span class="mw-cite-backlink"><a href="#cite_ref-5">^</a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="https://ing.dk/artikel/44843">07.01.2002, Ing.dk: Sød start på livet</a><small> (<a href="/wiki/Wikipedia:Artikler_med_d%C3%B8de_eksterne_henvisninger" title="Wikipedia:Artikler med døde eksterne henvisninger">Webside ikke længere tilgængelig</a>)</small> En af de vigtige energikilder for <a href="/wiki/Liv" title="Liv">liv</a> er nu fundet i <a href="/wiki/Meteorit" title="Meteorit">meteoritstykker</a>, der menes at stamme ude fra asteroidebæltet mellem Mars og Jupiter.</span> </li> <li id="cite_note-6"><span class="mw-cite-backlink"><a href="#cite_ref-6">^</a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="https://www.sciencedaily.com/releases/2004/06/040610074550.htm">2004-06-11, Sciencedaily: Newly Discovered Baby Planet Confounds Expectations: Raw Materials For Habitable Planets Around Surprisingly Young Stars</a> Citat: "...“We’ve seen the building blocks of habitable planets for the first time unambiguously” in stars that will turn out like our sun, says Watson..."</span> </li> <li id="cite_note-7"><span class="mw-cite-backlink"><a href="#cite_ref-7">^</a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="https://www.sciencedaily.com/releases/2009/11/091111121249.htm">The Swedish Research Council (2009, November 12). New Explanation For Nature's Hardiest Life Form. ScienceDaily. Retrieved November 15, 2009</a> Citat: "...In this form the <a href="/wiki/Bakterie" class="mw-redirect" title="Bakterie">bacteria</a> can survive for hundreds, perhaps millions, of years in a dormant state and, what's more, endure <a href="/wiki/T%C3%B8rke" title="Tørke">drought</a>, extreme <a href="/wiki/Temperatur" title="Temperatur">temperatures</a>, <a href="/wiki/Radioaktiv_str%C3%A5ling" class="mw-redirect" title="Radioaktiv stråling">radiation</a>, and <a href="/wiki/Toksin" title="Toksin">toxins</a> that would quickly knock out unprotected bacteria...<a href="/wiki/Bakteriespore" class="mw-redirect" title="Bakteriespore">spores</a> can survive temperatures up to 150 degrees centigrade..."</span> </li> <li id="cite_note-8"><span class="mw-cite-backlink"><a href="#cite_ref-8">^</a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="https://ing.dk/artikel/34569">30. oktober 2000, Ing.dk: Mikrober kan overleve rumtur</a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20120627012205/http://ing.dk/artikel/34569">Arkiveret</a> 27. juni 2012 hos <a href="/wiki/Wayback_Machine" title="Wayback Machine">Wayback Machine</a> Liv har muligvis bredt sig fra <a href="/wiki/Planet" title="Planet">planet</a> til planet via <a href="/wiki/Meteor" title="Meteor">meteorer</a>. Citat: "...indersiden af meteoren ikke har været opvarmet til mere end højst 40 grader. Det betyder, at det godt kan lade sig gøre for <a href="/wiki/Mikrobe" class="mw-redirect" title="Mikrobe">mikrober</a> at overleve en rejse gennem rummet...Iagttagelser af <a href="/wiki/Satellit" title="Satellit">satellitter</a> viser for eksempel, at <a href="/wiki/Bakterie" class="mw-redirect" title="Bakterie">bakterier</a> og <a href="/wiki/Svampe" title="Svampe">svampe</a> godt kan leve i rummet i mindst fem år..."</span> </li> <li id="cite_note-9"><span class="mw-cite-backlink"><a href="#cite_ref-9">^</a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="https://ing.dk/artikel/43383">13.01.2002, Ing.dk: Bakteriers første rumvandring i solskin</a><small> (<a href="/wiki/Wikipedia:Artikler_med_d%C3%B8de_eksterne_henvisninger" title="Wikipedia:Artikler med døde eksterne henvisninger">Webside ikke længere tilgængelig</a>)</small> Citat: "...bakteriesporer blevet båret ud i rummet via en satellit og derude udsat for solens stråler. De klarede sig godt..."</span> </li> <li id="cite_note-10"><span class="mw-cite-backlink"><a href="#cite_ref-10">^</a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://news.bbc.co.uk/1/hi/sci/tech/557021.stm">10 December, 1999, BBC News: Bacteria found in Antarctic ice core</a> Citat: "...related to microbes called <i>proteobacteria</i> and <i>actinomycetes</i>...If so, the microbes could be more than half a million years old...."</span> </li> <li id="cite_note-11"><span class="mw-cite-backlink"><a href="#cite_ref-11">^</a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://news.bbc.co.uk/hi/english/sci/tech/newsid_1765000/1765792.stm">17 January, 2002, BBCNews: Alien life could be like Antarctic bugs</a> Citat: "...<i>Beauveria bassiana</i>..."</span> </li> <li id="cite_note-12"><span class="mw-cite-backlink"><a href="#cite_ref-12">^</a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://news.bbc.co.uk/1/hi/sci/tech/827063.stm">BBC News, 10 July, 2000, Snow microbes found at South Pole</a> Citat: "...able to survive the large doses of <a href="/wiki/Ultraviolet" class="mw-redirect" title="Ultraviolet">ultraviolet</a> radiation, extreme cold and darkness...The microbes have DNA sequences similar to a category of bacteria known as <i>Deinococcus</i>..."</span> </li> <li id="cite_note-13"><span class="mw-cite-backlink"><a href="#cite_ref-13">^</a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://news.bbc.co.uk/1/hi/sci/tech/2585235.stm">BBCNews, 18 December, 2002, 'Space bugs' grown in lab</a> Citat: "...<i>Bacillus simplex</i> and <i>Staphylococcus pasteuri</i>...<i>Engyodontium album</i>...The strains cultured by Dr Wainwright seemed to be resistant to the effects of UV – one quality required for survival in space...."</span> </li> <li id="cite_note-14"><span class="mw-cite-backlink"><a href="#cite_ref-14">^</a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="https://ing.dk/artikel/45943">14. april 2002, Ing.dk: Brint-spisende bakterier i jorden</a><small> (<a href="/wiki/Wikipedia:Artikler_med_d%C3%B8de_eksterne_henvisninger" title="Wikipedia:Artikler med døde eksterne henvisninger">Webside ikke længere tilgængelig</a>)</small> Citat: "...Nye undersøgelser viser, at der findes enorme mængder bakterier under jorden, der lever af <a href="/wiki/Brint" title="Brint">brint</a>...", <a rel="nofollow" class="external text" href="http://news.bbc.co.uk/1/hi/sci/tech/1764716.stm">BBCNews: 16 January, 2002, Tough bugs point to life on Mars</a> Citat: "...This research demonstrates that certain microbes can thrive in the absence of sunlight by using <a href="/wiki/Hydrogen" class="mw-redirect" title="Hydrogen">hydrogen</a> gas..."</span> </li> <li id="cite_note-15"><span class="mw-cite-backlink"><a href="#cite_ref-15">^</a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="https://videnskab.dk/naturvidenskab/haardfoer-bakterie-overlever-et-helt-aar-udenpaa-den-internationale-rumstation">09 november 2020, videnskab.dk: Hårdfør bakterie overlever et helt år udenpå den Internationale Rumstation</a> Citat: "...Heriblandt dødelig UV-stråling, iskolde og brandvarme temperaturer samt vægtløshed, som er overraskende farligt over længere tid. Derfor imponerer D. radiodurans, der modstod alle disse ekstreme forhold, skriver ScienceAlert...Bakterierne, som havde været i rummet, havde udviklet nogle bevoksninger på overfladen, som forskerne stadig undersøger betydningen af..."</span> </li> <li id="cite_note-16"><span class="mw-cite-backlink"><a href="#cite_ref-16">^</a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://www.esa.int/esaCP/SEMUJM638FE_index_0.html">8 November 2005, ESA: Lichen survives in space</a> Citat: "...two different species (<a href="/w/index.php?title=Rhizocarpon_geographicum&action=edit&redlink=1" class="new" title="Rhizocarpon geographicum (ikke skrevet endnu)">Rhizocarpon geographicum</a> and <a href="/w/index.php?title=Xanthoria_elegans&action=edit&redlink=1" class="new" title="Xanthoria elegans (ikke skrevet endnu)">Xanthoria elegans</a>) were exposed for a total 14.6 days before being returned to Earth...indicate that lichens have the capacity to resist full exposure to the harsh space conditions, especially high levels of <a href="/wiki/Ultraviolet_str%C3%A5ling" class="mw-redirect" title="Ultraviolet stråling">UV radiation</a>. Analysis post flight showed a full rate of survival and an unchanged ability for <a href="/wiki/Fotosyntese" title="Fotosyntese">photosynthesis</a>..."</span> </li> <li id="cite_note-17"><span class="mw-cite-backlink"><a href="#cite_ref-17">^</a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://www.spacedaily.com/news/life-05zzzzzzzr.html">Nov 09, 2005, Space Daily: Lichen Survives In Space</a> Citat: "...suggests that lichens might survive at the surface of <a href="/wiki/Mars_(planet)" title="Mars (planet)">Mars</a>..."</span> </li> <li id="cite_note-18"><span class="mw-cite-backlink"><a href="#cite_ref-18">^</a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="https://www.sciencedaily.com/releases/2012/06/120623145623.htm">European Space Agency (2012, June 23). Lichen can survive in space: Space station research sheds light on origin of life; potential for better sunscreens. ScienceDaily</a> Citat: "...It seems possible that organisms could colonize planets by hitching rides on <a href="/wiki/Sm%C3%A5planet" class="mw-redirect" title="Småplanet">asteroids</a>. ESA is probing this intriguing theory further on future Station missions with different samples..."</span> </li> <li id="cite_note-19"><span class="mw-cite-backlink"><a href="#cite_ref-19">^</a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://videnskab.dk/miljo-naturvidenskab/mikroskopisk-orm-trives-bedre-i-rummet-end-pa-jorden">17. juli 2012, Mikroskopisk orm trives bedre i rummet end på Jorden</a> Citat: "...Deres medbragte følgesvende – mikroskopiske orm kaldet 'Caenorhabditis elegans' – var i derimod i glimrende form. »Rumormene levede længere, og havde bedre helbred end deres artsfæller på Jorden,« siger Post.doc Jason Hatton til Videnskab.dk..."</span> </li> </ol></div></div> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r11759279">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist 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