{"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\/fi\/evidence_found_that_comets_helped_to_make_earth_s_atmosphere\/","title":{"rendered":"Tutkimustulokset osoittavat, ett\u00e4 komeetat olivat mukana muodostamassa Maan ilmakeh\u00e4\u00e4!"},"content":{"rendered":"<div class=\"lede\">\n<p>Vuonna 2016 ESA:n Rosetta-luotain suoritti uskomattoman teht\u00e4v\u00e4n: se lensi komeetan luo, tutki sit\u00e4 kiertoradalta k\u00e4sin ja l\u00e4hetti sinne robottilaskeutujan! Sen avulla l\u00f6ydettiin todisteita siit\u00e4, ett\u00e4 komeetat t\u00f6rm\u00e4siv\u00e4t Maahan kauan sitten ja olivat mukana muodostamassa ilmakeh\u00e4\u00e4mme!<\/p>\n<\/div>\n<p>T\u00e4m\u00e4n t\u00e4rke\u00e4n l\u00f6yd\u00f6n tekemiseksi tutkijoiden piti toimia kuin etsiv\u00e4t. Tied\u00e4mme, ett\u00e4 maapallon ilmakeh\u00e4ss\u00e4 on pieni\u00e4 m\u00e4\u00e4ri\u00e4 ksenon-nimist\u00e4 kaasua. Ilmakeh\u00e4ss\u00e4mme on monia erilaisia ksenonlajeja, joista kukin muodostuu hieman eri tavalla. T\u00e4m\u00e4 antaa er\u00e4\u00e4nlaisen \u201csormenj\u00e4ljen\u201d, jonka avulla voidaan erottaa toisistaan erilaiset ksenonlajien seokset.<\/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>L\u00e4hikuva komeetasta<\/figcaption><\/figure>\n<p>Tutkijat ovat l\u00f6yt\u00e4neet ksenonia Marsin ohuesta ilmakeh\u00e4st\u00e4, asteroideista, Jupiterista sek\u00e4 Auringosta per\u00e4isin olevista hiukkasista. Maapallon ksenonilla on kuitenkin erilainen \u201csormenj\u00e4lki\u201d kuin n\u00e4ill\u00e4! T\u00e4m\u00e4 tarkoittaa, ett\u00e4 ksenoni, jota meill\u00e4 on t\u00e4\u00e4ll\u00e4 Maassa, on t\u00e4ytynyt tulla eri paikasta kuin ksenoni muualla aurinkokunnassa.<\/p>\n<p>Maapallon ksenon on hyvin vanhaa, ja seoksen koostumus on muuttunut ajan my\u00f6t\u00e4. Tutkijat k\u00e4yttiv\u00e4t tietokonemalleja ennustaakseen, millaista ksenon olisi ollut Maassa noin nelj\u00e4 ja puoli miljardia vuotta sitten, kun planeettamme oli muodostumassa. T\u00e4m\u00e4 vie meid\u00e4t takaisin ESA:n Rosetta-luotaimeen. Kun se tutki komeettaa, arvatkaa, mit\u00e4 se l\u00f6ysi? Ksenonia, jolla oli l\u00e4hes sama \u201csormenj\u00e4lki\u201d kuin muinaisella Maalla olleella ksenonilla!<\/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>Komeetat ovat saattaneet olla mukana muodostamassa Maan ilmakeh\u00e4\u00e4 miljardeja vuosia sitten<\/figcaption><\/figure>\n<p>T\u00e4m\u00e4 on vahva osoitus siit\u00e4, ett\u00e4 kauan sitten komeetat t\u00f6rm\u00e4siv\u00e4t Maahan ja toivat mukanaan ksenonia. Vaikka komeetan ksenoni onkin samankaltaista kuin varhaisen Maan ksenoni, se ei ole aivan samaa. Itse asiassa Rosettan l\u00f6yt\u00e4m\u00e4t todisteet viittaavat siihen, ett\u00e4 komeetat toivat noin 22% Maan muinaisesta ksenonista, kun taas loput ovat todenn\u00e4k\u00f6isesti per\u00e4isin asteroideista.<\/p>\n<p>Ja jos komeetat toivat mukanaan ksenonia, olisivatko ne voineet tuoda mukanaan my\u00f6s muita aineita? Ehk\u00e4 komeetat toivat mukanaan aminohappoja \u2013 yksi el\u00e4m\u00e4n rakennusaineista!<\/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>Oletko n\u00e4hnyt Rosettasta kertovia sarjakuviamme?<\/figcaption><\/figure>\n<p>ESAn Rosetta-luotaimen l\u00e4hett\u00e4mien tietojen ansiosta olemme p\u00e4\u00e4sem\u00e4ss\u00e4 l\u00e4hemm\u00e4ksi vastauksia kaikkiin n\u00e4ihin kysymyksiin \u2013 ja moniin muihinkin!<\/p>\n<p><b>Mielenkiintoinen fakta:<\/b> Rosettan tutkiman komeetan virallinen nimi on 67P\/Churyumov-Gerasimenko. Rosetta lensi uskomattoman l\u00e4helle komeettaa ker\u00e4t\u00e4kseen ksenonia \u2013 vain 5 km:n korkeudella sen pinnasta!<\/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\/fi\/wp-json\/wp\/v2\/posts\/439","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/comments?post=439"}],"version-history":[{"count":5,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/439\/revisions"}],"predecessor-version":[{"id":4475,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/439\/revisions\/4475"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/media?parent=439"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/categories?post=439"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/tags?post=439"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/panel?post=439"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/language?post=439"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/age?post=439"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/duration?post=439"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/resource_type?post=439"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/audience?post=439"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/wf_post_folders?post=439"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}