{"id":624,"date":"2013-09-19T09:25:00","date_gmt":"2013-09-19T07:25:00","guid":{"rendered":"https:\/\/kids.esa.int\/re-entry_nears_for_esa_s_ferrari_of_space\/"},"modified":"2026-10-08T00:30:24","modified_gmt":"2026-10-07T22:30:24","slug":"re-entry_nears_for_esa_s_ferrari_of_space","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/cs\/re-entry_nears_for_esa_s_ferrari_of_space\/","title":{"rendered":"Bl\u00ed\u017e\u00ed se n\u00e1vrat \u2018vesm\u00edrn\u00e9ho Ferrari\u2019 agentury ESA\u2019"},"content":{"rendered":"
\n

Po v\u00edce ne\u017e \u010dty\u0159ech letech na ob\u011b\u017en\u00e9 dr\u00e1ze se mise GOCE agentury ESA bl\u00ed\u017e\u00ed ke sv\u00e9mu konci. V polovin\u011b \u0159\u00edjna dojde satelitu palivo a jeho ob\u011b\u017en\u00e1 dr\u00e1ha se za\u010dne zkracovat. K n\u00e1vratu do atmosf\u00e9ry by m\u011blo doj\u00edt p\u0159ibli\u017en\u011b o t\u0159i t\u00fddny pozd\u011bji.<\/p>\n<\/div>\n

Satelit GOCE ob\u00edh\u00e1 kolem Zem\u011b od b\u0159ezna 2009 ve v\u00fd\u0161ce m\u00e9n\u011b ne\u017e 270 km, co\u017e je pro v\u011bdeck\u00fd satelit neobvykle n\u00edzko. Jeho \u00fakolem je s bezkonkuren\u010dn\u00ed p\u0159esnost\u00ed mapovat nepatrn\u00e9 odchylky zemsk\u00e9 povrchov\u00e9 gravitace.<\/p>\n

Gravitace je s\u00edla, kter\u00e1 p\u0159itahuje v\u0161e k zemi. Gravita\u010dn\u00ed s\u00edla Zem\u011b se v\u0161ak v jednotliv\u00fdch m\u00edstech m\u00edrn\u011b li\u0161\u00ed. \u010c\u00e1ste\u010dn\u011b je to zp\u016fsobeno t\u00edm, \u017ee planeta nen\u00ed dokonale kulat\u00e1 \u2013 na p\u00f3lech je m\u00edrn\u011b zplo\u0161t\u011bl\u00e1. Gravitaci ovliv\u0148uj\u00ed tak\u00e9 vysok\u00e9 hory a hlubok\u00e9 oce\u00e1nsk\u00e9 p\u0159\u00edkopy, stejn\u011b jako tlou\u0161\u0165ka a hustota oce\u00e1n\u016f a horninov\u00fdch vrstev.<\/p>\n

\"New
Nov\u00fd geoid GOCE<\/figcaption><\/figure>\n

Kdy\u017e GOCE prol\u00e9t\u00e1 nad oblastmi s odli\u0161nou gravita\u010dn\u00ed silou, sonda se pohupuje nahoru a dol\u016f a jej\u00ed p\u0159\u00edstroje zaznamen\u00e1vaj\u00ed tyto zm\u011bny v jej\u00ed dr\u00e1ze. Takov\u00e1 p\u0159esn\u00e1 m\u011b\u0159en\u00ed umo\u017enila jej\u00ed n\u00edzk\u00e1 ob\u011b\u017en\u00e1 dr\u00e1ha a elegantn\u00ed aerodynamick\u00fd design, d\u00edky \u010demu\u017e si vyslou\u017eila p\u0159ezd\u00edvku \u2018Ferrari vesm\u00edru\u2019. Tento jedine\u010dn\u00fd satelit je nav\u00edc mimo\u0159\u00e1dn\u011b stabiln\u00ed, proto\u017ee neobsahuje \u017e\u00e1dn\u00e9 pohybliv\u00e9 \u010d\u00e1sti, jak\u00e9 se \u010dasto pou\u017e\u00edvaj\u00ed u jin\u00fdch kosmick\u00fdch lod\u00ed.<\/p>\n

Data ze satelitu GOCE byla vyu\u017eita ke studiu oce\u00e1nsk\u00fdch proud\u016f, zm\u011bn hladiny mo\u0159e, v\u00fd\u0161ky zemsk\u00e9ho povrchu a vrstevnat\u00e9 struktury zemsk\u00e9 horninov\u00e9 k\u016fry. Satelit dokonce zaznamenal v\u011btry ve vesm\u00edru a zvukov\u00e9 vlny, kter\u00e9 se \u0161\u00ed\u0159ily vzh\u016fru atmosf\u00e9rou po mohutn\u00e9m zem\u011bt\u0159esen\u00ed, kter\u00e9 zas\u00e1hlo Japonsko 11. b\u0159ezna 2011. Snad nejd\u016fle\u017eit\u011bj\u0161\u00edm v\u00fdsledkem je mimo\u0159\u00e1dn\u011b p\u0159esn\u00fd model (zn\u00e1m\u00fd jako \u2018geoid\u2019) zemsk\u00e9 gravitace. Geoid ukazuje, jak by Zem\u011b vypadala, kdyby gravitace byla v\u0161ude na jej\u00edm povrchu stejn\u00e1, tak\u017ee by voda nete\u010dela z jednoho m\u00edsta na druh\u00e9.<\/p>","protected":false},"excerpt":{"rendered":"

After more than four years in orbit, ESA\u2019s GOCE mission is nearing its end. In mid-October, the satellite will run out of fuel and its orbit will begin to decay. […]<\/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\/2008\/03\/goce_in_orbit4\/18246217-2-eng-GB\/GOCE_in_orbit.jpg","esa_banner_description":"GOCE in orbit","esa_banner_credit":"ESA\/AOES Medialab","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2008\/03\/GOCE_in_orbit4","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":[26],"tags":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-624","post","type-post","status-publish","format-standard","hentry","category-news"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/posts\/624","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=624"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/posts\/624\/revisions"}],"predecessor-version":[{"id":4591,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/posts\/624\/revisions\/4591"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/media?parent=624"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/categories?post=624"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/tags?post=624"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/panel?post=624"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/language?post=624"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/age?post=624"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/duration?post=624"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/resource_type?post=624"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/audience?post=624"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/wf_post_folders?post=624"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}