{"id":887,"date":"2007-03-16T12:23:00","date_gmt":"2007-03-16T11:23:00","guid":{"rendered":"https:\/\/kids.esa.int\/radar_s_icy_echoes_on_mars\/"},"modified":"2026-10-08T00:33:23","modified_gmt":"2026-10-07T22:33:23","slug":"radar_s_icy_echoes_on_mars","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/et\/radar_s_icy_echoes_on_mars\/","title":{"rendered":"Radari j\u00e4ised kajad Marsil"},"content":{"rendered":"<div class=\"lede\">\n<p>Marsi peetakse sageli k\u00f5rbetega kaetud kuivaks planeediks. Siiski on Punasel Planeedil, nagu Maalgi, kaks suurt j\u00e4\u00e4katet p\u00f5hja- ja l\u00f5unapoolusel. Kui inimesed peaksid kunagi Marsil elama hakkama, on oluline teada, kui palju k\u00fclmunud vett neis j\u00e4\u00e4kilpides on. Just seda ongi avastamas ESA Mars Expressi orbitaalaparaadi MARSIS-seade.<\/p>\n<\/div>\n<p>L\u00f5unapoolse j\u00e4\u00e4katte paksuse m\u00f5\u00f5tmiseks saadab radar seadmestik pinnale n\u00e4htamatuid signaale ja salvestab neile j\u00e4rgnevad kaja. Sel viisil suudab radar \u2018n\u00e4ha\u2019 l\u00e4bi kihtide kuni j\u00e4\u00e4 p\u00f5hja. Polaari katvatest j\u00e4\u00e4- ja tolmukihidest on tehtud \u00fcle 300 sellist \u2018l\u00f5iget\u2019.<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"2369\" data-credit=\"NASA\/JPL\/ASI\/ESA\/Univ. of Rome\/MOLA Science Team\/USGS\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2007\/03\/Thickness_of_Mars_South_Polar_Layered_Deposits2\" 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\/2007\/03\/thickness_of_mars_south_polar_layered_deposits2\/17892316-2-eng-GB\/Thickness_of_Mars_South_Polar_Layered_Deposits.jpg\" alt=\"Thickness of Mars&#x27; South Polar Layered Deposits\"><figcaption>Marsi l\u00f5unapooluse kihiliste setete paksus<\/figcaption><\/figure>\n<p>N\u00fc\u00fcd teame, et l\u00f5unapoolne j\u00e4\u00e4kilp on kuni 3,7 km paks. Kui kogu j\u00e4\u00e4 sulaks, kataks kogu planeeti umbes 11 meetri s\u00fcgavune ookean. Hoolimata selle tohutu j\u00e4\u00e4kilbi raskusest ei ole j\u00e4\u00e4 all olev kivim alla surutud \u2013 see on t\u00f5endiks, et see on j\u00e4igem kui Maa koorik.<\/p>\n<p>P\u00f5hjapooluse j\u00e4\u00e4katte k\u00e4imasolevad radaruuringud on n\u00e4idanud, et selle paksus on umbes 1,8 km. M\u00f5lema pooluse \u00f5hukesed veej\u00e4\u00e4- ja tolmukihid tunduvad olevat tingitud hooajalistest ja pikaajalistest kliimamuutustest. Kuigi polaarj\u00e4\u00e4m\u00fctsid hoiavad endas enamikku t\u00e4nap\u00e4eva Marsi teadaolevast veest, v\u00f5isid planeedi teised kohad kauges minevikus olla piisavalt niisked, et toetada elu tekkimist.<\/p>","protected":false},"excerpt":{"rendered":"<p>Mars is often regarded as an arid world covered by deserts. However, like Earth, the Red Planet has two large ice caps at its north and south poles. If people [&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\/2007\/03\/bright_lower_echo_from_mars_south-polar_layered_deposits2\/17901975-2-eng-GB\/Bright_lower_echo_from_Mars_south-polar_layered_deposits.jpg","esa_banner_description":"Bright lower echo from Mars\u2019 south-polar layered deposits","esa_banner_credit":"NASA\/JPL\/ASI\/ESA\/Univ. of Rome\/MOLA Science Team","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2007\/03\/Bright_lower_echo_from_Mars_south-polar_layered_deposits2","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":[10,11,12],"tags":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-887","post","type-post","status-publish","format-standard","hentry","category-learn","category-our-universe","category-planets-and-moons","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/posts\/887","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/comments?post=887"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/posts\/887\/revisions"}],"predecessor-version":[{"id":4723,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/posts\/887\/revisions\/4723"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/media?parent=887"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/categories?post=887"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/tags?post=887"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/panel?post=887"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/language?post=887"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/age?post=887"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/duration?post=887"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/resource_type?post=887"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/audience?post=887"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/wf_post_folders?post=887"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}