{"id":900,"date":"2008-12-15T09:35:00","date_gmt":"2008-12-15T08:35:00","guid":{"rendered":"https:\/\/kids.esa.int\/life_on_extrasolar_planets\/"},"modified":"2026-10-08T00:33:33","modified_gmt":"2026-10-07T22:33:33","slug":"life_on_extrasolar_planets","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/da\/life_on_extrasolar_planets\/","title":{"rendered":"Livet p\u00e5 planeter uden for solsystemet"},"content":{"rendered":"
\n

I 2008 opdagede NASA\/ESA\u2019s Hubble-rumteleskop kuldioxid i atmosf\u00e6ren p\u00e5 en planet p\u00e5 st\u00f8rrelse med Jupiter, der kredser om en anden stjerne. Dette blev betragtet som et vigtigt skridt i jagten p\u00e5 tegn p\u00e5 liv p\u00e5 andre planeter.<\/p>\n<\/div>\n

Der er indtil videre opdaget omkring 300 planeter, der kredser om fjerne stjerner. Desv\u00e6rre er disse exoplaneter s\u00e5 svage og s\u00e5 langt v\u00e6k, at det er yderst vanskeligt at unders\u00f8ge dem. Men med moderne instrumenter begynder forskerne gradvist at l\u00e6re mere om disse fremmede verdener og de gasser, der udg\u00f8r deres atmosf\u00e6rer.<\/p>\n

Kuldioxid er den gas, som planter udskiller om natten og bruger til at vokse. Dyr og mennesker ud\u00e5nder den hvert par sekunder. Som en af de vigtigste drivhusgasser holder den p\u00e5 varmen og bidrager til at opvarme planeten. Kulstof er ogs\u00e5 grundlaget for de s\u00e5kaldte organiske forbindelser, som er blandt livets byggesten. Nu har Hubble vist, at vi kan p\u00e5vise kuldioxid p\u00e5 fjerne planeter og estimere, hvor meget der er til stede. Dette er et stort fremskridt i den langsigtede indsats for at finde ud af, hvad disse verdener best\u00e5r af, og om de kan rumme liv.<\/p>\n

Planeten, der kaldes HD 189733b, er for varm til at kunne rumme liv. Den er dog velegnet til observation, da den forsvinder bag sin ledsagestjerne en gang hver 2,2. dag. Ved at studere de regelm\u00e6ssige \u00e6ndringer i det lys, der n\u00e5r Jorden, kan forskerne analysere planetens atmosf\u00e6re. Der er allerede fundet vanddamp og metan. De nye Hubble-observationer beviser, at de kemiske grundforuds\u00e6tninger for liv kan m\u00e5les p\u00e5 planeter, der kredser om andre stjerner.<\/p>","protected":false},"excerpt":{"rendered":"

In 2008, the NASA\/ESA Hubble Space Telescope discovered carbon dioxide in the atmosphere of a Jupiter-sized planet orbiting another star. This was seen as an important step in the search […]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"esa_banner_image":"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2008\/12\/hd_189733b2\/18246735-2-eng-GB\/HD_189733b.jpg","esa_banner_description":"HD 189733b","esa_banner_credit":"ESA, NASA, M. Kornmesser (ESA\/Hubble) and STScI","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2008\/12\/HD_189733b2","esa_external_url":"","esa_external_new_window":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":true},"categories":[14,10,13],"tags":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-900","post","type-post","status-publish","format-standard","hentry","category-are-we-alone","category-learn","category-life-in-space"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/900","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/comments?post=900"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/900\/revisions"}],"predecessor-version":[{"id":2043,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/900\/revisions\/2043"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/media?parent=900"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/categories?post=900"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/tags?post=900"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/panel?post=900"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/language?post=900"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/age?post=900"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/duration?post=900"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/resource_type?post=900"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/audience?post=900"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/wf_post_folders?post=900"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}