{"id":1012,"date":"2010-06-28T14:39:00","date_gmt":"2010-06-28T12:39:00","guid":{"rendered":"https:\/\/kids.esa.int\/the_asteroid_and_the_disappearing_star\/"},"modified":"2026-10-08T00:34:51","modified_gmt":"2026-10-07T22:34:51","slug":"the_asteroid_and_the_disappearing_star","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/cs\/the_asteroid_and_the_disappearing_star\/","title":{"rendered":"Asteroid a mizej\u00edc\u00ed hv\u011bzda"},"content":{"rendered":"<div class=\"lede\">\n<p>8. \u010dervence zmiz\u00ed z no\u010dn\u00ed oblohy pom\u011brn\u011b jasn\u00e1 hv\u011bzda zn\u00e1m\u00e1 jako Delta Ophiuchi. Nen\u00ed v\u0161ak d\u016fvod k obav\u00e1m. Tato hv\u011bzda, viditeln\u00e1 pouh\u00fdm okem, nen\u00ed pohlcena ani neum\u00edr\u00e1 \u2013 jednodu\u0161e ji zakryje rychle se pohybuj\u00edc\u00ed asteroid.<\/p>\n<\/div>\n<p>Na n\u011bkolik sekund se tento mal\u00fd kus sk\u00e1ly, zn\u00e1m\u00fd jako (472) Roma, ocitne ve spr\u00e1vn\u00fd \u010das na spr\u00e1vn\u00e9m m\u00edst\u011b, aby zast\u00ednil hv\u011bzdn\u00e9 sv\u011btlo dopadaj\u00edc\u00ed na Zemi. Jedn\u00e1 se o vz\u00e1cnou ud\u00e1lost \u2013 jedin\u00fd p\u0159\u00edpad v tomto stolet\u00ed, kdy bude mo\u017en\u00e9 pozorovat, jak asteroid zakryje hv\u011bzdu, a to bez pomoci dalekohledu \u010di teleskopu.<\/p>\n<p>Ka\u017ed\u00fd zn\u00e1 slune\u010dn\u00ed zatm\u011bn\u00ed, kdy n\u00e1\u0161 M\u011bs\u00edc p\u0159ejde p\u0159ed Sluncem a obloha se na n\u011bkolik minut zatm\u00ed. A\u010dkoli je M\u011bs\u00edc 400kr\u00e1t men\u0161\u00ed ne\u017e Slunce, je tak\u00e9 400kr\u00e1t bl\u00ed\u017e, a proto dok\u00e1\u017ee zakr\u00fdt cel\u00fd disk na\u0161\u00ed nejbli\u017e\u0161\u00ed hv\u011bzdy.<\/p>\n<figure class=\"wp-block-image size-natural\" data-width=\"364\" data-credit=\"NASA\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2010\/07\/A_grazing_occultation_of_Rhea_a_moon_of_Saturn_by_another_moon_Dione2\" 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\/2010\/07\/a_grazing_occultation_of_rhea_a_moon_of_saturn_by_another_moon_dione2\/17872928-2-eng-GB\/A_grazing_occultation_of_Rhea_a_moon_of_Saturn_by_another_moon_Dione.jpg\" alt=\"A grazing occultation of Rhea, a moon of Saturn, by another moon, Dione\"><figcaption>Zakryt\u00ed m\u011bs\u00edce Saturnu Rhea jin\u00fdm m\u011bs\u00edcem, Dione, p\u0159i jeho ob\u011b\u017en\u00e9 dr\u00e1ze<\/figcaption><\/figure>\n<p>Tot\u00e9\u017e se m\u016f\u017ee st\u00e1t i u vzd\u00e1len\u011bj\u0161\u00edch hv\u011bzd. Asteroid o \u0161\u00ed\u0159ce 50 km, jako je Roma, m\u016f\u017ee na kr\u00e1tkou dobu zakr\u00fdt obrovskou hv\u011bzdu, jako je Delta Ophiuchi, proto\u017ee se nach\u00e1z\u00ed mnohem bl\u00ed\u017ee k n\u00e1m. Takov\u00e9 ud\u00e1losti jsou d\u016fle\u017eit\u00e9, proto\u017ee umo\u017e\u0148uj\u00ed astronom\u016fm ur\u010dit velikost a tvar asteroid\u016f \u2013 v\u010detn\u011b t\u011bch, kter\u00e9 by jednoho dne mohly narazit do Zem\u011b.<\/p>\n<p>Zmizen\u00ed t\u00e9to hv\u011bzdy bude vid\u011bt pouze z p\u00e1su \u0161irok\u00e9ho asi 50 km, kter\u00fd spojuje Stockholm, Koda\u0148, Br\u00e9my, Nantes, Bilbao a Kan\u00e1rsk\u00e9 ostrovy. Dojde k n\u011bmu p\u0159ibli\u017en\u011b ve 23:57 SEL\u010c, i kdy\u017e p\u0159esn\u00fd \u010das se bude m\u00edsto od m\u00edsta li\u0161it.<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"1008\" data-credit=\"Credits: ESA, created with Guide 8 by Project Pluto http:\/\/www.projectpluto.com\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2010\/07\/Star_chart_showing_the_sky_from_central_Europe2\" 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\/2010\/07\/star_chart_showing_the_sky_from_central_europe2\/18249399-2-eng-GB\/Star_chart_showing_the_sky_from_central_Europe.jpg\" alt=\"Star chart showing the sky from central Europe\"><figcaption>Hv\u011bzdn\u00e1 mapa zn\u00e1zor\u0148uj\u00edc\u00ed oblohu nad st\u0159edn\u00ed Evropou<\/figcaption><\/figure>","protected":false},"excerpt":{"rendered":"<p>On 8 July, a fairly bright star, known as Delta Ophiuchi, will disappear from the night sky. However, there is no need to worry. The naked eye star is not [&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\/2003\/04\/asteroids_come_in_many_shapes_and_sizes2\/17886580-2-eng-GB\/Asteroids_come_in_many_shapes_and_sizes.jpg","esa_banner_description":"Asteroids come in many shapes and sizes","esa_banner_credit":"courtesy Observatoire de Paris","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2003\/04\/Asteroids_come_in_many_shapes_and_sizes2","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":[46,10,11],"tags":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-1012","post","type-post","status-publish","format-standard","hentry","category-comets-and-meteors","category-learn","category-our-universe"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/posts\/1012","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=1012"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/posts\/1012\/revisions"}],"predecessor-version":[{"id":4795,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/posts\/1012\/revisions\/4795"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/media?parent=1012"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/categories?post=1012"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/tags?post=1012"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/panel?post=1012"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/language?post=1012"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/age?post=1012"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/duration?post=1012"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/resource_type?post=1012"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/audience?post=1012"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/wf_post_folders?post=1012"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}