{"id":676,"date":"2013-04-24T07:12:00","date_gmt":"2013-04-24T05:12:00","guid":{"rendered":"https:\/\/kids.esa.int\/herschel_solves_mystery_of_jupiter_s_water\/"},"modified":"2026-10-08T00:31:02","modified_gmt":"2026-10-07T22:31:02","slug":"herschel_solves_mystery_of_jupiter_s_water","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fi\/herschel_solves_mystery_of_jupiter_s_water\/","title":{"rendered":"Herschel ratkaisee Jupiterin veden mysteerin"},"content":{"rendered":"<p>Jupiter, aurinkokunnan suurin planeetta, koostuu p\u00e4\u00e4osin vedyst\u00e4 ja heliumista. Sen yl\u00e4ilmakeh\u00e4st\u00e4 on l\u00f6ydetty pieni\u00e4 m\u00e4\u00e4ri\u00e4 vett\u00e4, mutta t\u00e4h\u00e4n asti kukaan ei ollut varma, mist\u00e4 t\u00e4m\u00e4 vesi oli per\u00e4isin. Vastauksen t\u00e4h\u00e4n pitk\u00e4\u00e4n jatkuneeseen mysteeriin on antanut ESA:n Herschel-avaruusobservatorio, joka on herkkin infrapunateleskooppi, joka on koskaan laukaistu avaruuteen. Herschel on l\u00f6yt\u00e4nyt kiistattomia todisteita siit\u00e4, ett\u00e4 vesi saapui planeetalle useiden komeettojen t\u00f6rm\u00e4ysten seurauksena hein\u00e4kuussa 1994!<\/p>\n<p>T\u00f6rm\u00e4ykset avaruudesta saapuvien kappaleiden kanssa ovat jatkuva uhka aurinkokunnan planeetoille, mukaan lukien Maa. Tutkijat ovat kuitenkin havainneet vain harvoja t\u00e4llaisia t\u00f6rm\u00e4yksi\u00e4. Ensimm\u00e4inen suora havainto t\u00e4llaisesta tapahtumasta tehtiin Jupiterilla 19 vuotta sitten. T\u00e4htitieteilij\u00e4t seurasivat h\u00e4mm\u00e4stynein\u00e4, kun 21 kappaletta Shoemaker-Levy 9 -komeetasta sy\u00f6ksyi planeetan yl\u00e4ilmakeh\u00e4\u00e4n ja r\u00e4j\u00e4hti.<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"1765\" data-credit=\"Water map: ESA\/Herschel\/T. Cavali\u00e9 et al.; Jupiter image: NASA\/ESA\/Reta Beebe (New Mexico State University)\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2013\/04\/Water_in_Jupiter_s_atmosphere2\" 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\/2013\/04\/water_in_jupiter_s_atmosphere2\/17899570-2-eng-GB\/Water_in_Jupiter_s_atmosphere.jpg\" alt=\"Water in Jupiter&#x27;s atmosphere\"><figcaption>Vesi Jupiterin ilmakeh\u00e4ss\u00e4<\/figcaption><\/figure>\n<p>ESAn vuonna 1995 laukaisema infrapuna-avaruusobservatorio oli ensimm\u00e4inen, joka havaitsi ja tutki vett\u00e4 Jupiterin yl\u00e4ilmakeh\u00e4ss\u00e4. Tutkijat pystyiv\u00e4t sulkemaan pois sis\u00e4isen l\u00e4hteen, kuten alhaalta nousevan veden. Mutta jos vesi oli per\u00e4isin ulkopuolelta, mist\u00e4 se sitten tuli?<\/p>\n<p>Yleisesti spekuloitiin, ett\u00e4 Shoemaker-Levy 9 -komeetta saattoi olla t\u00e4m\u00e4n veden alkuper\u00e4, mutta suoraa n\u00e4ytt\u00f6\u00e4 puuttui. Nyt Herschelin herk\u00e4t infrapunasilm\u00e4t ovat ratkaisseet mysteerin. Avaruushavaintoasema on havainnut Jupiterin etel\u00e4isell\u00e4 pallonpuoliskolla 2\u20133 kertaa enemm\u00e4n vett\u00e4 kuin pohjoisella pallonpuoliskolla. Veden j\u00e4lki\u00e4 l\u00f6ytyy vain suurista korkeuksista, ja suurin osa siit\u00e4 on keskittynyt vuoden 1994 komeettat\u00f6rm\u00e4ysten ymp\u00e4rille.<\/p>\n<p>ESA:n JUICE-luotain, jonka laukaisu kohti t\u00e4t\u00e4 j\u00e4ttil\u00e4isplaneettaa on suunniteltu vuodelle 2022, tulee tekem\u00e4\u00e4n entist\u00e4kin tarkempia havaintoja Jupiterin valtavan ilmakeh\u00e4n muodostavista kaasuista.<\/p>","protected":false},"excerpt":{"rendered":"<p>Jupiter, the largest planet in the Solar System, is mostly made of the gases hydrogen and helium. Tiny amounts of water have been found in its upper atmosphere, but, until [&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\/2013\/04\/shoemaker-levy_9_impact_site_g\/17905016-2-eng-GB\/Shoemaker-Levy_9_impact_site_G.jpg","esa_banner_description":"Shoemaker-Levy 9 impact site G","esa_banner_credit":"R. Evans, J. Trauger, H. 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