{"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\/ro\/radar_s_icy_echoes_on_mars\/","title":{"rendered":"Ecourile \u00eenghe\u021bate ale radarului pe Marte"},"content":{"rendered":"<div class=\"lede\">\n<p>Marte este adesea considerat\u0103 o lume arid\u0103, acoperit\u0103 de de\u0219erturi. Cu toate acestea, la fel ca P\u0103m\u00e2ntul, Planeta Ro\u0219ie are dou\u0103 calote glaciare mari la polii nordic \u0219i sudic. Dac\u0103 oamenii vor ajunge \u00eentr-o bun\u0103 zi s\u0103 locuiasc\u0103 pe Marte, este important s\u0103 \u0219tim c\u00e2t\u0103 ap\u0103 \u00eenghe\u021bat\u0103 se afl\u0103 \u00een aceste calote glaciare. Tocmai acest lucru este descoperit de instrumentul MARSIS de pe sonda Mars Express a ESA.<\/p>\n<\/div>\n<p>Pentru a m\u0103sura grosimea calotei de ghea\u021b\u0103 din sud, instrumentul radar transmite semnale invizibile c\u0103tre suprafa\u021b\u0103 \u0219i \u00eenregistreaz\u0103 ecourile. \u00cen acest fel, radarul este capabil s\u0103 \u2018vad\u0103\u2019 prin straturi p\u00e2n\u0103 la baza ghe\u021bii. Au fost realizate peste 300 de astfel de \u2018sec\u021biuni\u2019 prin depozitele de ghea\u021b\u0103 \u0219i praf care acoper\u0103 polul.<\/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>Grosimea depozitelor stratificate de la polul sud al planetei Marte<\/figcaption><\/figure>\n<p>\u0218tim acum c\u0103 calota sudic\u0103 are o grosime de p\u00e2n\u0103 la 3,7 km. Dac\u0103 toat\u0103 ghea\u021ba s-ar topi, \u00eentreaga planet\u0103 ar fi acoperit\u0103 de un ocean cu o ad\u00e2ncime de aproximativ 11 metri. \u00cen ciuda greut\u0103\u021bii acestei calote de ghea\u021b\u0103 uria\u0219e, roca de sub ghea\u021b\u0103 nu a fost \u00eempins\u0103 \u00een jos \u2013 dovad\u0103 c\u0103 aceasta este mai rigid\u0103 dec\u00e2t scoar\u021ba terestr\u0103.<\/p>\n<p>Studiile radar \u00een curs de desf\u0103\u0219urare asupra calotei polare nordice au ar\u0103tat c\u0103 aceasta are o grosime de aproximativ 1,8 km. Straturile sub\u021biri de ghea\u021b\u0103 de ap\u0103 \u0219i praf de la ambii poli par s\u0103 fie cauzate de schimb\u0103rile climatice sezoniere \u0219i pe termen lung. De\u0219i calotele polare con\u021bin cea mai mare parte a apei cunoscute pe Marte \u00een prezent, este posibil ca alte locuri de pe planet\u0103 s\u0103 fi fost suficient de umede pentru a sus\u021bine via\u021ba \u00een trecutul \u00eendep\u0103rtat.<\/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\/ro\/wp-json\/wp\/v2\/posts\/887","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/comments?post=887"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/posts\/887\/revisions"}],"predecessor-version":[{"id":4723,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/posts\/887\/revisions\/4723"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/media?parent=887"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/categories?post=887"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/tags?post=887"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/panel?post=887"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/language?post=887"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/age?post=887"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/duration?post=887"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/resource_type?post=887"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/audience?post=887"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/wf_post_folders?post=887"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}