{"id":879,"date":"2006-07-27T09:13:00","date_gmt":"2006-07-27T07:13:00","guid":{"rendered":"https:\/\/kids.esa.int\/methane_lakes_and_ice_pebbles\/"},"modified":"2026-10-08T00:33:18","modified_gmt":"2026-10-07T22:33:18","slug":"methane_lakes_and_ice_pebbles","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/cs\/methane_lakes_and_ice_pebbles\/","title":{"rendered":"Metanov\u00e1 jezera a ledov\u00e9 obl\u00e1zky"},"content":{"rendered":"<div class=\"lede\">\n<p>Saturn\u016fv m\u011bs\u00edc Titan je jedn\u00edm z nejv\u011bt\u0161\u00edch a nejzaj\u00edmav\u011bj\u0161\u00edch satelit\u016f ve slune\u010dn\u00ed soustav\u011b. Jeho povrch je bohu\u017eel skryt pod hustou vrstvou oran\u017eov\u00fdch mrak\u016f. A\u017e doned\u00e1vna nikdo nev\u011bd\u011bl, jak vypad\u00e1 povrch Titanu.<\/p>\n<\/div>\n<p>Jedn\u00edm ze zp\u016fsob\u016f, jak proniknout skrz obla\u010dnou vrstvu, je vyu\u017eit\u00ed radarov\u00e9ho p\u0159\u00edstroje na sond\u011b Cassini agentury NASA. R\u00e1diov\u00e9 sign\u00e1ly ze sondy Cassini proch\u00e1zej\u00ed obla\u010dnou vrstvou a odr\u00e1\u017eej\u00ed se zp\u011bt od povrchu. Na z\u00e1klad\u011b anal\u00fdzy t\u011bchto odraz\u016f se v\u011bdc\u016fm v posledn\u00ed dob\u011b poda\u0159ilo objevit mnoho tmav\u00fdch skvrn. N\u011bkter\u00e9 z t\u011bchto skvrn souvisej\u00ed s \u00fazk\u00fdmi, klikat\u00fdmi kan\u00e1ly \u2013 pravd\u011bpodobn\u011b \u0159ekami.<\/p>\n<p>Zd\u00e1 se pravd\u011bpodobn\u00e9, \u017ee hladk\u00e9, tmav\u00e9 oblasti na radarov\u00fdch sn\u00edmc\u00edch jsou jezera. Teplota na povrchu Titanu v\u0161ak \u010din\u00ed -180 \u00b0C, tak\u017ee nemohou obsahovat vodu. M\u00edsto toho se zd\u00e1, \u017ee jsou tvo\u0159eny kapaln\u00fdm metanem nebo etanem. (Na Zemi se metan pou\u017e\u00edv\u00e1 jako palivo v kotl\u00edch a spor\u00e1c\u00edch.)<\/p>\n<figure class=\"wp-block-image size-natural\" data-width=\"546\" data-credit=\"ESA\/NASA\/JPL\/University of Arizona\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2005\/01\/First_colour_view_of_Titan_s_surface2\" 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\/2005\/01\/first_colour_view_of_titan_s_surface2\/17907791-2-eng-GB\/First_colour_view_of_Titan_s_surface.png\" alt=\"First colour view of Titan&#x27;s surface\"><figcaption>Prvn\u00ed barevn\u00fd sn\u00edmek povrchu Titanu<\/figcaption><\/figure>\n<p>Mnoho lid\u00ed doufalo, \u017ee sonda Huygens agentury ESA p\u0159i sv\u00e9m sestupu k povrchu dne 14. ledna 2005 dopadne do jezera s metanem. Jej\u00ed kamera v\u0161ak zachytila suchou pl\u00e1\u0148 pokrytou ledov\u00fdmi kam\u00ednky.<\/p>\n<p>Od tohoto velkolep\u00e9ho \u00fasp\u011bchu na\u0161li v\u011bdci neobvykl\u00fd zp\u016fsob, jak se dozv\u011bd\u011bt v\u00edce o okol\u00ed sondy Huygens. Kl\u00ed\u010dem k tomu byl neobvykl\u00fd vzorec kol\u00eds\u00e1n\u00ed v r\u00e1diov\u00e9m sign\u00e1lu vys\u00edlan\u00e9m sondou Huygens sm\u011brem k sond\u011b Cassini. \u010c\u00e1st r\u00e1diov\u00e9ho paprsku se odr\u00e1\u017eela od povrchu a nesm\u011b\u0159ovala p\u0159\u00edmo k sond\u011b Cassini. Anal\u00fdza sign\u00e1lu uk\u00e1zala, \u017ee povrch je do vzd\u00e1lenosti 2 km od sondy pom\u011brn\u011b rovn\u00fd. Dno tohoto vyschl\u00e9ho jezera je pokryto p\u0159ev\u00e1\u017en\u011b ledov\u00fdmi obl\u00e1zky o pr\u016fm\u011bru asi 5\u201310 cm.<\/p>","protected":false},"excerpt":{"rendered":"<p>Saturn\u2019s moon Titan is one of the largest and most fascinating satellites in the Solar System. Unfortunately, its surface is hidden beneath a thick blanket of orange cloud. Until recently, [&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\/2006\/07\/lakes_on_titan2\/18249176-2-eng-GB\/Lakes_on_Titan.jpg","esa_banner_description":"Lakes on Titan","esa_banner_credit":"NASA\/JPL","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2006\/07\/Lakes_on_Titan2","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":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-879","post","type-post","status-publish","format-standard","hentry","category-learn","category-our-universe","category-planets-and-moons"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/posts\/879","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/comments?post=879"}],"version-history":[{"count":5,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/posts\/879\/revisions"}],"predecessor-version":[{"id":4716,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/posts\/879\/revisions\/4716"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/media?parent=879"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/categories?post=879"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/tags?post=879"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/panel?post=879"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/language?post=879"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/age?post=879"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/duration?post=879"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/resource_type?post=879"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/audience?post=879"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/wf_post_folders?post=879"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}