{"id":439,"date":"2017-06-21T12:26:00","date_gmt":"2017-06-21T10:26:00","guid":{"rendered":"https:\/\/kids.esa.int\/evidence_found_that_comets_helped_to_make_earth_s_atmosphere\/"},"modified":"2026-10-08T00:28:13","modified_gmt":"2026-10-07T22:28:13","slug":"evidence_found_that_comets_helped_to_make_earth_s_atmosphere","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/nb\/evidence_found_that_comets_helped_to_make_earth_s_atmosphere\/","title":{"rendered":"Det er funnet bevis p\u00e5 at kometer bidro til \u00e5 danne Jordens atmosf\u00e6re!"},"content":{"rendered":"<div class=\"lede\">\n<p>I 2016 fullf\u00f8rte en ESA-sonde ved navn Rosetta et utrolig oppdrag: den fl\u00f8y til en komet, studerte den fra bane rundt den og sendte ned en robotlandingsfart\u00f8y! Deretter fant de bevis p\u00e5 at kometer krasjet inn i Jorden for lenge siden, og bidro til \u00e5 danne atmosf\u00e6ren v\u00e5r!<\/p>\n<\/div>\n<p>For \u00e5 gj\u00f8re denne viktige oppdagelsen m\u00e5tte forskerne opptre som detektiver. Vi vet at jordens atmosf\u00e6re inneholder sv\u00e6rt sm\u00e5 mengder av en gass som kalles xenon. Det finnes mange typer xenon i atmosf\u00e6ren v\u00e5r, og hver type dannes p\u00e5 en litt annen m\u00e5te. Dette gir en slags \u201cfingeravtrykk\u201d som kan brukes til \u00e5 skille mellom ulike blandinger av xenontyper.<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"1843\" data-credit=\"ESA\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2017\/06\/Comet_67_PChuryumov-Gerasimenko_on_15_May_2016\" 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\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2017\/06\/comet_67_pchuryumov-gerasimenko_on_15_may_2016\/17905867-2-eng-GB\/Comet_67_PChuryumov-Gerasimenko_on_15_May_2016.jpg\" alt=\"A close-up photo of the comet\" \/><figcaption>Et n\u00e6rbilde av kometen<\/figcaption><\/figure>\n<p>Forskere har funnet xenon i Mars\u201c tynne atmosf\u00e6re, i asteroider, p\u00e5 Jupiter og i partikler fra Solen. Men xenonet p\u00e5 Jorden har et annet \u201dfingeravtrykk\u00bb enn disse! Dette betyr at xenonet vi har her p\u00e5 Jorden m\u00e5 ha kommet fra et annet sted enn xenonet andre steder i solsystemet.<\/p>\n<p>Xenonet p\u00e5 Jorden er sv\u00e6rt gammelt, og sammensetningen har endret seg over tid. Forskere brukte datamodeller for \u00e5 forutsi hvordan xenonet p\u00e5 Jorden ville ha v\u00e6rt for rundt fire og en halv milliard \u00e5r siden, da planeten v\u00e5r var i ferd med \u00e5 dannes. Dette bringer oss tilbake til ESA-sonden Rosetta. Da den unders\u00f8kte kometen, gjett hva den oppdaget? Xenon med nesten det samme \u201cfingeravtrykket\u201d som xenonet p\u00e5 den urtidlige Jorden!<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"1920\" data-credit=\"ESA\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2017\/06\/Fresh_from_Earth\" 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\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2017\/06\/fresh_from_earth\/17898569-2-eng-GB\/Fresh_from_Earth.jpg\" alt=\"Comets could have helped to make Earth\u2019s atmosphere, billions of years ago\" \/><figcaption>Kometer kan ha bidratt til dannelsen av Jordens atmosf\u00e6re for milliarder av \u00e5r siden<\/figcaption><\/figure>\n<p>Dette er sterke bevis p\u00e5 at kometer for lenge siden kolliderte med Jorden og f\u00f8rte med seg xenon. Men selv om kometens xenon ligner p\u00e5 det som fantes p\u00e5 den tidlige Jorden, er det ikke helt det samme. Faktisk tyder bevisene som Rosetta har funnet p\u00e5 at kometer bidro med omtrent 22% til Jordens opprinnelige xenon, mens resten sannsynligvis kom fra asteroider.<\/p>\n<p>Og hvis kometer brakte med seg xenon, kan de da ha brakt med seg andre ting ogs\u00e5? Kanskje kometer brakte med seg aminosyrer \u2013 en av livets byggesteiner!<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"1920\" data-credit=\"ESA\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2017\/06\/Rosetta_goes_on_an_excursion\" 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\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2017\/06\/rosetta_goes_on_an_excursion\/17866860-3-eng-GB\/Rosetta_goes_on_an_excursion.png\" alt=\"Have you seen our cartoons about Rosetta?\" \/><figcaption>Har du sett tegneseriene v\u00e5re om Rosetta?<\/figcaption><\/figure>\n<p>Takket v\u00e6re dataene som ESAs Rosetta-sonde har sendt tilbake, n\u00e6rmer vi oss svarene p\u00e5 alle disse sp\u00f8rsm\u00e5lene \u2013 og enda flere!<\/p>\n<p><b>Et interessant faktum:<\/b> Det offisielle navnet p\u00e5 kometen som Rosetta unders\u00f8kte, er 67P\/Churyumov-Gerasimenko. Rosetta fl\u00f8y utrolig n\u00e6r kometen for \u00e5 samle inn xenon \u2013 bare 5 km over overflaten!<\/p>","protected":false},"excerpt":{"rendered":"<p>In 2016, an ESA probe called Rosetta completed an incredible mission: flying to a comet, studying it from orbit, and sending down a robotic lander! They then found evidence that [&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\/2017\/06\/rosetta_at_comet\/17873224-2-eng-GB\/Rosetta_at_Comet.jpg","esa_banner_description":"Rosetta and its lander have made amazing discoveries","esa_banner_credit":"ESA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2017\/06\/Rosetta_at_Comet","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":[26],"tags":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-439","post","type-post","status-publish","format-standard","hentry","category-news"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/posts\/439","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/comments?post=439"}],"version-history":[{"count":5,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/posts\/439\/revisions"}],"predecessor-version":[{"id":4475,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/posts\/439\/revisions\/4475"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/media?parent=439"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/categories?post=439"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/tags?post=439"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/panel?post=439"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/language?post=439"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/age?post=439"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/duration?post=439"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/resource_type?post=439"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/audience?post=439"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/wf_post_folders?post=439"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}