{"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\/sv\/life_on_extrasolar_planets\/","title":{"rendered":"Livet p\u00e5 planeter utanf\u00f6r v\u00e5rt solsystem"},"content":{"rendered":"
\n

\u00c5r 2008 uppt\u00e4ckte NASA:s och ESA:s rymdteleskop Hubble koldioxid i atmosf\u00e4ren hos en planet av Jupiters storlek som kretsade kring en annan stj\u00e4rna. Detta betraktades som ett viktigt steg i jakten p\u00e5 bevis f\u00f6r liv p\u00e5 andra v\u00e4rldar.<\/p>\n<\/div>\n

Hittills har man uppt\u00e4ckt omkring 300 planeter som kretsar kring avl\u00e4gsna stj\u00e4rnor. Tyv\u00e4rr \u00e4r dessa exoplaneter s\u00e5 svaga och ligger s\u00e5 l\u00e5ngt bort att det \u00e4r extremt sv\u00e5rt att studera dem. Men med hj\u00e4lp av moderna instrument b\u00f6rjar forskarna gradvis l\u00e4ra sig mer om dessa fr\u00e4mmande v\u00e4rldar och de gaser som utg\u00f6r deras atmosf\u00e4rer.<\/p>\n

Koldioxid \u00e4r den gas som v\u00e4xter avger under natten och anv\u00e4nder f\u00f6r att v\u00e4xa. Djur och m\u00e4nniskor andas ut den med n\u00e5gra sekunders mellanrum. Som en av de viktigaste v\u00e4xthusgaserna h\u00e5ller den kvar v\u00e4rme och bidrar till att v\u00e4rma upp planeten. Kol \u00e4r ocks\u00e5 grunden f\u00f6r s\u00e5 kallade organiska f\u00f6reningar, som h\u00f6r till livets byggstenar. Nu har Hubble visat att vi kan uppt\u00e4cka koldioxid p\u00e5 avl\u00e4gsna planeter och uppskatta hur mycket som finns d\u00e4r. Detta \u00e4r ett stort framsteg i det l\u00e5ngsiktiga arbetet med att ta reda p\u00e5 vad dessa v\u00e4rldar best\u00e5r av och om de skulle kunna hysa liv.<\/p>\n

Planeten, som kallas HD 189733b, \u00e4r f\u00f6r het f\u00f6r att kunna hysa liv. Den \u00e4r dock ett bra observationsobjekt eftersom den f\u00f6rsvinner bakom sin f\u00f6ljeslagare en g\u00e5ng var 2,2:a dag. Genom att studera de regelbundna f\u00f6r\u00e4ndringarna i det ljus som n\u00e5r jorden kan forskarna analysera planetens atmosf\u00e4r. Man har redan hittat vatten\u00e5nga och metan. De nya Hubble-observationerna bevisar att de kemiska grundf\u00f6ruts\u00e4ttningarna f\u00f6r liv kan m\u00e4tas p\u00e5 planeter som kretsar kring andra stj\u00e4rnor.<\/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\/sv\/wp-json\/wp\/v2\/posts\/900","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/comments?post=900"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/900\/revisions"}],"predecessor-version":[{"id":2043,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/900\/revisions\/2043"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/media?parent=900"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/categories?post=900"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/tags?post=900"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/panel?post=900"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/language?post=900"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/age?post=900"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/duration?post=900"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/resource_type?post=900"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/audience?post=900"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/wf_post_folders?post=900"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}