{"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\/hu\/radar_s_icy_echoes_on_mars\/","title":{"rendered":"A radar jeges visszhangjai a Marson"},"content":{"rendered":"<div class=\"lede\">\n<p>A Marsot gyakran sivatagokkal bor\u00edtott, sz\u00e1raz vil\u00e1gnak tartj\u00e1k. Azonban a F\u00f6ldh\u00f6z hasonl\u00f3an a V\u00f6r\u00f6s Bolyg\u00f3nak is van k\u00e9t nagy j\u00e9gsapk\u00e1ja az \u00e9szaki \u00e9s a d\u00e9li sark\u00e1n. Ha az emberek egy napon a Marson fognak \u00e9lni, fontos tudni, hogy mennyi fagyott v\u00edz tal\u00e1lhat\u00f3 ezekben a j\u00e9gtakar\u00f3kban. Pontosan ezt der\u00edti ki az ESA Mars Express szond\u00e1j\u00e1n tal\u00e1lhat\u00f3 MARSIS m\u0171szer.<\/p>\n<\/div>\n<p>A d\u00e9li j\u00e9gtakar\u00f3 vastags\u00e1g\u00e1nak m\u00e9r\u00e9s\u00e9hez a radar l\u00e1thatatlan jeleket k\u00fcld a felsz\u00edn fel\u00e9, \u00e9s r\u00f6gz\u00edti a visszhangokat. \u00cdgy a radar k\u00e9pes \u2018\u00e1tl\u00e1tni\u2019 a r\u00e9tegeken, eg\u00e9szen a j\u00e9g alj\u00e1ig. T\u00f6bb mint 300 ilyen \u2018metszetet\u2019 k\u00e9sz\u00edtettek a sarkot bor\u00edt\u00f3 j\u00e9g- \u00e9s porlerak\u00f3d\u00e1sokon kereszt\u00fcl.<\/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>A Mars d\u00e9li sark\u00e1n tal\u00e1lhat\u00f3 r\u00e9teges \u00fcled\u00e9kek vastags\u00e1ga<\/figcaption><\/figure>\n<p>Ma m\u00e1r tudjuk, hogy a d\u00e9li j\u00e9gsapka vastags\u00e1ga ak\u00e1r 3,7 km is lehet. Ha az \u00f6sszes j\u00e9g elolvadna, az eg\u00e9sz bolyg\u00f3t k\u00f6r\u00fclbel\u00fcl 11 m\u00e9ter m\u00e9ly \u00f3ce\u00e1n bor\u00edtan\u00e1. E hatalmas j\u00e9gtakar\u00f3 s\u00falya ellen\u00e9re a j\u00e9g alatt l\u00e9v\u0151 k\u0151zet nem s\u00fcllyedt le \u2013 ez arra utal, hogy merevebb, mint a F\u00f6ld k\u00e9reg.<\/p>\n<p>Az \u00e9szaki sarkvid\u00e9ki j\u00e9gsapka jelenleg is foly\u00f3 radaros vizsg\u00e1latai kimutatt\u00e1k, hogy vastags\u00e1ga k\u00f6r\u00fclbel\u00fcl 1,8 km. \u00dagy t\u0171nik, hogy a k\u00e9t sarkon tal\u00e1lhat\u00f3 v\u00e9kony v\u00edzj\u00e9g- \u00e9s porr\u00e9tegek az \u00e9ghajlat szezon\u00e1lis \u00e9s hossz\u00fa t\u00e1v\u00fa v\u00e1ltoz\u00e1sainak k\u00f6vetkezm\u00e9nyei. B\u00e1r a sarkvid\u00e9ki j\u00e9gsapk\u00e1k tartalmazz\u00e1k a mai Mars ismert v\u00edzk\u00e9szlet\u00e9nek legnagyobb r\u00e9sz\u00e9t, a bolyg\u00f3 m\u00e1s ter\u00fcletei a t\u00e1voli m\u00faltban el\u00e9g nedvesek lehettek ahhoz, hogy \u00e9letet t\u00e1pl\u00e1ljanak.<\/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\/hu\/wp-json\/wp\/v2\/posts\/887","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/comments?post=887"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/posts\/887\/revisions"}],"predecessor-version":[{"id":4723,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/posts\/887\/revisions\/4723"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/media?parent=887"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/categories?post=887"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/tags?post=887"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/panel?post=887"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/language?post=887"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/age?post=887"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/duration?post=887"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/resource_type?post=887"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/audience?post=887"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/wf_post_folders?post=887"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}