{"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\/sl\/radar_s_icy_echoes_on_mars\/","title":{"rendered":"Ledene odmeve radarja na Marsu"},"content":{"rendered":"<div class=\"lede\">\n<p>Mars se pogosto obravnava kot su\u0161en svet, prekrit s pu\u0161\u010davami. Vendar ima Rde\u010di planet, podobno kot Zemlja, na severnem in ju\u017enem polu dve veliki ledeni pokrovi. \u010ce bodo ljudje nekega dne \u017eiveli na Marsu, je pomembno vedeti, koliko zamrznjene vode je v teh ledenih pokrovih. Prav to zdaj ugotavlja instrument MARSIS na sondi Mars Express Evropske vesoljske agencije (ESA).<\/p>\n<\/div>\n<p>Za merjenje debeline ju\u017enega ledenega pokrova radarski instrument po\u0161ilja nevidne signale proti povr\u0161ini in bele\u017ei odmeve. Na ta na\u010din je radar sposoben \u2018videti\u2019 skozi plasti vse do dna ledu. Narejenih je bilo ve\u010d kot 300 takih \u2018rezov\u2019 skozi plasti ledu in prahu, ki prekrivajo pol.<\/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>Debelina slojnih usedlin na ju\u017enem polu Marsa<\/figcaption><\/figure>\n<p>Danes vemo, da je ju\u017ena ledena kapica debela do 3,7 km. \u010ce bi se ves led stopil, bi celoten planet prekrival ocean, globok pribli\u017eno 11 metrov. Kljub te\u017ei tega ogromnega ledenega pokrova se kamnina pod ledom ni potisnila navzdol \u2013 to je dokaz, da je trdnej\u0161a od zemeljske skorje.<\/p>\n<p>Teko\u010de radarske raziskave severne polarne kape so pokazale, da je debela pribli\u017eno 1,8 km. Zdi se, da so tanke plasti vodnega ledu in prahu na obeh polih posledica sezonskih in dolgoro\u010dnih podnebnih sprememb. \u010ceprav polarni pokrovi vsebujejo ve\u010dino znane vode na sodobnem Marsu, so bila morda v daljni preteklosti tudi druga obmo\u010dja na planetu dovolj vla\u017ena, da so omogo\u010dala \u017eivljenje.<\/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\/sl\/wp-json\/wp\/v2\/posts\/887","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/sl\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/sl\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/sl\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/sl\/wp-json\/wp\/v2\/comments?post=887"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/sl\/wp-json\/wp\/v2\/posts\/887\/revisions"}],"predecessor-version":[{"id":4723,"href":"https:\/\/kids.esa.int\/sl\/wp-json\/wp\/v2\/posts\/887\/revisions\/4723"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/sl\/wp-json\/wp\/v2\/media?parent=887"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/sl\/wp-json\/wp\/v2\/categories?post=887"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/sl\/wp-json\/wp\/v2\/tags?post=887"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/sl\/wp-json\/wp\/v2\/panel?post=887"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/sl\/wp-json\/wp\/v2\/language?post=887"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/sl\/wp-json\/wp\/v2\/age?post=887"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/sl\/wp-json\/wp\/v2\/duration?post=887"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/sl\/wp-json\/wp\/v2\/resource_type?post=887"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/sl\/wp-json\/wp\/v2\/audience?post=887"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/sl\/wp-json\/wp\/v2\/wf_post_folders?post=887"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}