{"id":218,"date":"2021-03-22T11:41:45","date_gmt":"2021-03-22T10:41:45","guid":{"rendered":"https:\/\/kids.esa.int\/esa_s_mars_express_finds_more_underground_water\/"},"modified":"2026-10-08T00:25:38","modified_gmt":"2026-10-07T22:25:38","slug":"esa_s_mars_express_finds_more_underground_water","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fi\/esa_s_mars_express_finds_more_underground_water\/","title":{"rendered":"ESAn Mars Express l\u00f6yt\u00e4\u00e4 lis\u00e4\u00e4 maanalaisia vesivaroja"},"content":{"rendered":"<div class=\"lede\">\n<p>ESAn Mars Express -avaruusluotain on tutkinut ahkerasti Punaista planeettaa. Missiossa mukana olevat tutkijat ovat juuri tehneet j\u00e4nnitt\u00e4v\u00e4n ilmoituksen: he ovat l\u00f6yt\u00e4neet runsaasti nestem\u00e4ist\u00e4 vett\u00e4!<\/p>\n<\/div>\n<p>Suuri j\u00e4rvi, jonka koko oli 20 x 30 km ja joka oli suunnilleen Rooman kaupungin kokoinen, oli <a href=\"https:\/\/www.esa.int\/kids\/en\/learn\/Our_Universe\/Planets_and_moons\/Liquid_water_found_on_Mars\" target=\"_blank\" rel=\"noopener\">perustettu vuonna 2018<\/a> Marsin etel\u00e4navan alueella. N\u00e4m\u00e4 uudet tutkimukset ovat paljastaneet kolme muuta sit\u00e4 ymp\u00e4r\u00f6iv\u00e4\u00e4 lampea. Ne ovat kuitenkin kaikki haudattuina 1,5 kilometrin paksuisen j\u00e4\u00e4kerroksen alle! Tutkijat arvelevat, ett\u00e4 lampien vesi on suolaista, mink\u00e4 ansiosta se voi pysy\u00e4 nestem\u00e4isen\u00e4 eik\u00e4 j\u00e4\u00e4dy kiinte\u00e4ksi Marsin kylmiss\u00e4 l\u00e4mp\u00f6tiloissa.<\/p>\n<p>Mars Express kiert\u00e4\u00e4 punaisen planeetan kiertoradalla. T\u00e4m\u00e4n havainnon tekemiseksi se k\u00e4ytti erityist\u00e4 laitetta nimelt\u00e4 MARSIS, joka on lyhenne sanoista Mars Advanced Radar for Subsurface and Ionosphere Sounding. MARSIS on \u201cmaaper\u00e4n l\u00e4p\u00e4isev\u00e4 tutka\u201d, mik\u00e4 tarkoittaa, ett\u00e4 se l\u00e4hett\u00e4\u00e4 tutkapulsseja kiertoradalta kohti Marsin pintaa. Mittaamalla, kuinka kauan pulssien paluu kest\u00e4\u00e4 ja kuinka voimakkaita ne ovat, tutkijat voivat selvitt\u00e4\u00e4, millainen maaper\u00e4 on pinnan alla.<\/p>\n<figure class=\"wp-block-embed is-type-video\"><iframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/Am0yFQJIGOs\" title=\"YouTube-videosoitin\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe><\/figure>\n<p>Kauan sitten Mars oli l\u00e4mpim\u00e4mpi ja kosteampi, ja sen pinnalla virtaili vett\u00e4. Ajan my\u00f6t\u00e4 olosuhteet muuttuivat, eik\u00e4 nestem\u00e4inen vesi voi en\u00e4\u00e4 pysy\u00e4 pinnalla pitk\u00e4\u00e4n. N\u00e4iden lammikoiden l\u00f6yt\u00e4minen viittaa kuitenkin j\u00e4nnitt\u00e4v\u00e4\u00e4n mahdollisuuteen, ett\u00e4 Marsin pinnan alla voisi olla kokonaisia, miljoonia tai jopa miljardeja vuosia vanhoja muinaisten j\u00e4rvien j\u00e4rjestelmi\u00e4. Voisivatko ne olla yksinkertaisten muukalaisel\u00e4m\u00e4nmuotojen elinymp\u00e4rist\u00f6j\u00e4? T\u00e4m\u00e4 on mahdollista, mutta niiden tutkiminen ja asian varmistaminen olisi eritt\u00e4in vaikeaa.<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"8000\" data-credit=\"ESA\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2019\/05\/Ten_things_you_did_not_know_about_Mars_6._Water\" 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\/2019\/05\/ten_things_you_did_not_know_about_mars_6._water\/19409834-7-eng-GB\/Ten_things_you_did_not_know_about_Mars_6._Water.png\" alt=\"Ten things you did not know about Mars: 6. Water\"><figcaption>Kymmenen asiaa, joita et tiennyt Marsista: 6. Vesi<\/figcaption><\/figure>\n<p>Kuvittele, ett\u00e4 sinulla olisi teht\u00e4v\u00e4 suunnitella robotti, joka tutkisi n\u00e4it\u00e4 lampia. Keksitk\u00f6 tavan, jolla voisit murtaa j\u00e4\u00e4n ja tutkia sitten vett\u00e4? Mit\u00e4 saattaisit l\u00f6yt\u00e4\u00e4?<\/p>\n<p><i>Mielenkiintoinen fakta: Mars Expressin tutkatietojen tutkimiseen k\u00e4ytetyt menetelm\u00e4t ovat samankaltaisia kuin ne, joita tutkijat k\u00e4ytt\u00e4v\u00e4t maanalaisiin j\u00e4rviin liittyviss\u00e4 tutkimuksissa Maassa, Antarktikalla, Kanadassa ja Gr\u00f6nlannissa.<\/i><\/p>\n<p><i>\u00a0<\/i><\/p>","protected":false},"excerpt":{"rendered":"<p>ESA\u2019s Mars Express spacecraft has been busy exploring the red planet. Mission scientists have just made an exciting announcement: they have discovered lots of liquid water! A large lake of [&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\/2003\/04\/artist_s_impression_of_water_under_the_martian_surface\/9968426-2-eng-GB\/Artist_s_impression_of_water_under_the_martian_surface.jpg","esa_banner_description":"Artist\u2019s impression of water under the martian surface","esa_banner_credit":"Illustration by Medialab, ESA 2001","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2003\/04\/Artist_s_impression_of_water_under_the_martian_surface","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-218","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\/218","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=218"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/218\/revisions"}],"predecessor-version":[{"id":4360,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/218\/revisions\/4360"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/media?parent=218"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/categories?post=218"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/tags?post=218"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/panel?post=218"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/language?post=218"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/age?post=218"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/duration?post=218"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/resource_type?post=218"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/audience?post=218"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/wf_post_folders?post=218"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}