{"id":1060,"date":"2007-07-12T13:03:00","date_gmt":"2007-07-12T11:03:00","guid":{"rendered":"https:\/\/kids.esa.int\/scientists_find_an_extrasolar_sauna\/"},"modified":"2026-10-08T00:35:27","modified_gmt":"2026-10-07T22:35:27","slug":"scientists_find_an_extrasolar_sauna","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/sv\/scientists_find_an_extrasolar_sauna\/","title":{"rendered":"Forskare uppt\u00e4cker en bastu utanf\u00f6r solsystemet"},"content":{"rendered":"<div class=\"lede\">\n<p>En utomjording som flyger f\u00f6rbi jorden kan knappast undg\u00e5 att l\u00e4gga m\u00e4rke till att v\u00e5r bl\u00e5 planet till stor del t\u00e4cks av hav. Jorden \u00e4r dock den enda vattenkl\u00e4dda v\u00e4rlden i v\u00e5rt solsystem. Eftersom vattenrika planeter verkar vara ganska s\u00e4llsynta \u00e4r det inte f\u00f6rv\u00e5nande att forskarna \u00e4r entusiastiska \u00f6ver den f\u00f6rsta uppt\u00e4ckten av en vattenrik atmosf\u00e4r p\u00e5 en planet som kretsar kring en avl\u00e4gsen stj\u00e4rna.<\/p>\n<\/div>\n<p>Man k\u00e4nner till mer \u00e4n 200 av dessa \u2018extrasol\u00e4ra\u2019 planeter, men endast ett f\u00e5tal har avbildats eller observerats direkt. Lyckligtvis kan vissa av dessa \u2018osynliga\u2019 planeter uppt\u00e4ckas n\u00e4r de passerar framf\u00f6r sina stj\u00e4rnor. Det var s\u00e5 gasj\u00e4tten HD 189733b uppt\u00e4cktes \u00e5r 2005. Den Jupiterliknande planeten orsakade en svag avmattning av ljuset fr\u00e5n sin moderstj\u00e4rna.<\/p>\n<figure class=\"wp-block-image size-natural\" data-width=\"400\" data-credit=\"ESA (C.Carreau)\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2007\/07\/Transiting_exoplanet_HD_189733b_in_the_infrared2\" data-licence=\"ESA Standard Licence\" data-licence-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Terms_and_conditions_of_use_of_images_and_videos_available_on_the_esa_website\"><img decoding=\"async\" loading=\"lazy\" style=\"max-width:100%;height:auto\" src=\"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2007\/07\/transiting_exoplanet_hd_189733b_in_the_infrared2\/17867266-3-eng-GB\/Transiting_exoplanet_HD_189733b_in_the_infrared.jpg\" alt=\"Transiting exoplanet HD 189733b, in the infrared\"><figcaption>Den f\u00f6rbig\u00e5ende exoplaneten HD 189733b, i infrar\u00f6tt ljus<\/figcaption><\/figure>\n<p>Sedan dess har europeiska och amerikanska forskare genomf\u00f6rt ytterligare studier av HD 189733b. Med hj\u00e4lp av NASA:s rymdteleskop Spitzer m\u00e4tte de det infrar\u00f6da ljuset som str\u00e5lade ut fr\u00e5n stj\u00e4rnan. N\u00e4r planeten l\u00e5ngsamt r\u00f6rde sig \u00f6ver stj\u00e4rnans skiva blockerade dess yttre atmosf\u00e4r en viss v\u00e5gl\u00e4ngd av ljuset i h\u00f6gre grad \u00e4n andra v\u00e5gl\u00e4ngder. Den enda f\u00f6rklaringen till detta m\u00f6nster av ljusf\u00f6rsvagning \u00e4r f\u00f6rekomsten av vatten\u00e5nga i planetens atmosf\u00e4r.<\/p>\n<p>Tyv\u00e4rr har den gigantiska planeten ingen stenig yta d\u00e4r hav kan bildas. Den kretsar dessutom extremt n\u00e4ra sin stj\u00e4rna. Med en atmosf\u00e4rstemperatur p\u00e5 \u00f6ver 700 \u00b0C \u00e4r det alldeles f\u00f6r varmt f\u00f6r att det ska kunna regna. Den \u00e5ngande HD 189733b \u00e4r med st\u00f6rsta sannolikhet livl\u00f6s. Dessa resultat v\u00e4cker dock f\u00f6rhoppningar om att man inom en inte alltf\u00f6r avl\u00e4gsen framtid ska kunna hitta vattenrika, jordliknande planeter.<\/p>","protected":false},"excerpt":{"rendered":"<p>An alien flying past the Earth could hardly fail to notice that our blue planet is largely covered by oceans. However, Earth is the only water-covered world in our Solar [&hellip;]<\/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\/2007\/07\/transiting_exoplanet_hd_189733b2\/17903269-2-eng-GB\/Transiting_exoplanet_HD_189733b.jpg","esa_banner_description":"Transiting exoplanet HD 189733b","esa_banner_credit":"ESA - C.Carreau","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2007\/07\/Transiting_exoplanet_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-1060","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\/1060","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=1060"}],"version-history":[{"count":5,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/1060\/revisions"}],"predecessor-version":[{"id":4828,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/1060\/revisions\/4828"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/media?parent=1060"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/categories?post=1060"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/tags?post=1060"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/panel?post=1060"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/language?post=1060"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/age?post=1060"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/duration?post=1060"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/resource_type?post=1060"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/audience?post=1060"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/wf_post_folders?post=1060"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}