{"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\/da\/evidence_found_that_comets_helped_to_make_earth_s_atmosphere\/","title":{"rendered":"Der er fundet beviser for, at kometer var med til at danne Jordens atmosf\u00e6re!"},"content":{"rendered":"<div class=\"lede\">\n<p>I 2016 gennemf\u00f8rte en ESA-sonde ved navn Rosetta en utrolig mission: den fl\u00f8j ud til en komet, unders\u00f8gte den fra kredsl\u00f8b og sendte en robotlandingsfart\u00f8j ned til overfladen! Man fandt derefter beviser for, at kometer for l\u00e6nge siden styrtede ned p\u00e5 Jorden og var med til at danne vores atmosf\u00e6re!<\/p>\n<\/div>\n<p>For at g\u00f8re denne vigtige opdagelse m\u00e5tte forskerne g\u00e5 til v\u00e6rks som detektiver. Vi ved, at Jordens atmosf\u00e6re indeholder sm\u00e5 m\u00e6ngder af en gas kaldet xenon. Der findes mange forskellige typer xenon i vores atmosf\u00e6re, og hver type dannes p\u00e5 en lidt anden m\u00e5de. Dette giver en slags \u201cfingeraftryk\u201d, der kan bruges til at skelne mellem forskellige blandinger af 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\u00e6rbillede af kometen<\/figcaption><\/figure>\n<p>Forskere har fundet xenon i Mars\u201c tynde atmosf\u00e6re, i asteroider, p\u00e5 Jupiter og i partikler fra Solen. Men Jordens xenon har et andet \u201dfingeraftryk\u00ab end disse! Det betyder, at det xenon, vi har her p\u00e5 Jorden, m\u00e5 stamme fra et andet sted end det xenon, der findes andre steder i solsystemet.<\/p>\n<p>Xenonet p\u00e5 Jorden er meget gammelt, og sammens\u00e6tningen har \u00e6ndret sig med tiden. Forskere brugte computermodeller til at forudsige, hvordan xenonet p\u00e5 Jorden ville have set ud for omkring fire og en halv milliard \u00e5r siden, da vores planet var ved at blive dannet. Det bringer os tilbage til ESA-sonden Rosetta. Da den unders\u00f8gte kometen, g\u00e6t s\u00e5, hvad den opdagede? Xenon med n\u00e6sten det samme \u201cfingeraftryk\u201d som xenonet p\u00e5 den gamle Jord!<\/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 have v\u00e6ret med til at danne Jordens atmosf\u00e6re for milliarder af \u00e5r siden<\/figcaption><\/figure>\n<p>Dette er et st\u00e6rkt bevis p\u00e5, at kometer for l\u00e6nge siden styrtede ned p\u00e5 Jorden og medbragte xenon. Men selvom kometens xenon ligner det fra den tidlige Jord, er det ikke helt det samme. Faktisk tyder de beviser, som Rosetta har fundet, p\u00e5, at kometer bidrog med omkring 22% til Jordens forhistoriske xenon, mens resten sandsynligvis stammede fra asteroider.<\/p>\n<p>Og hvis kometerne bragte xenon med sig, kunne de s\u00e5 ogs\u00e5 have bragt andre ting med? M\u00e5ske bragte kometerne aminosyrer med sig \u2013 en af livets byggesten!<\/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 set vores tegneserier om Rosetta?<\/figcaption><\/figure>\n<p>Takket v\u00e6re de data, som ESA\u2019s Rosetta-sonde har sendt tilbage, kommer vi t\u00e6ttere p\u00e5 at finde svar p\u00e5 alle disse sp\u00f8rgsm\u00e5l \u2013 og meget mere!<\/p>\n<p><b>Sjovt faktum:<\/b> Det officielle navn p\u00e5 den komet, som Rosetta unders\u00f8gte, er 67P\/Churyumov-Gerasimenko. Rosetta fl\u00f8j utroligt t\u00e6t p\u00e5 kometen for at indsamle xenon \u2013 kun 5 km over dens overflade!<\/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\/da\/wp-json\/wp\/v2\/posts\/439","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=439"}],"version-history":[{"count":5,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/439\/revisions"}],"predecessor-version":[{"id":4475,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/439\/revisions\/4475"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/media?parent=439"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/categories?post=439"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/tags?post=439"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/panel?post=439"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/language?post=439"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/age?post=439"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/duration?post=439"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/resource_type?post=439"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/audience?post=439"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/wf_post_folders?post=439"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}