{"id":6506,"date":"2026-03-31T07:36:52","date_gmt":"2026-03-31T05:36:52","guid":{"rendered":"https:\/\/www.zsvltava.cz\/fyzika\/?p=6506"},"modified":"2026-04-01T11:50:42","modified_gmt":"2026-04-01T09:50:42","slug":"dart","status":"publish","type":"post","link":"https:\/\/www.zsvltava.cz\/fyzika\/?p=6506","title":{"rendered":"DART"},"content":{"rendered":"<p><strong>Mise NASA s n\u00e1zvem DART (Double Asteroid Redirection Test) m\u011bla jasn\u00fd c\u00edl: otestovat, jestli dok\u00e1\u017eeme zm\u011bnit dr\u00e1hu asteroidu pomoc\u00ed \u0159\u00edzen\u00e9ho n\u00e1razu kosmick\u00e9 sondy. V roce 2022 sonda \u00famysln\u011b narazila do mal\u00e9ho asteroidu Dimorphos, kter\u00fd ob\u00edh\u00e1 kolem v\u011bt\u0161\u00edho t\u011blesa Didymos. Tento syst\u00e9m nep\u0159edstavuje \u017e\u00e1dn\u00e9 nebezpe\u010d\u00ed pro Zemi \u2013 byl vybr\u00e1n \u010dist\u011b jako \u201etestovac\u00ed ter\u010d\u201c. V\u00fdsledek ale p\u0159ekvapil i samotn\u00e9 v\u011bdce.<\/strong><\/p>\n<p><iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/nHBuVbGkmBY?si=FzxqZrbNFfvGJ5b5\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<p>Bezprost\u0159edn\u011b po n\u00e1razu se zm\u011bnila ob\u011b\u017en\u00e1 dr\u00e1ha Dimorphosu kolem Didymosu mnohem v\u00edc, ne\u017e se \u010dekalo \u2013 zkr\u00e1tila se asi o 33 minut. To bylo zp\u016fsobeno nejen samotn\u00fdm n\u00e1razem, ale i obrovsk\u00fdm mno\u017estv\u00edm materi\u00e1lu, kter\u00fd byl vyvr\u017een do vesm\u00edru a fungoval jako dodate\u010dn\u00fd \u201eraketov\u00fd efekt\u201c. Jin\u00fdmi slovy, asteroid dostal v\u011bt\u0161\u00ed \u201ekopanec\u201c, ne\u017e by odpov\u00eddalo jen hmotnosti sondy.<\/p>\n<p><iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/gDIOcVI7uP4?si=L8LGqRk1BimuVZHF\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<p>Nov\u00e9 studie ale uk\u00e1zaly je\u0161t\u011b zaj\u00edmav\u011bj\u0161\u00ed v\u011bc: mise DART neovlivnila jen pohyb jednoho asteroidu kolem druh\u00e9ho, ale dokonce i pohyb cel\u00e9 dvojice kolem Slunce. Zm\u011bna je sice extr\u00e9mn\u011b mal\u00e1 (\u0159\u00e1dov\u011b zlomky sekundy na ob\u011bh), ale jde o prvn\u00ed p\u0159\u00edpad v historii, kdy lid\u00e9 prokazateln\u011b zm\u011bnili dr\u00e1hu kosmick\u00e9ho t\u011blesa kolem Slunce.<\/p>\n<h2>Z\u00e1b\u011bry st\u0159etu s asteroidem<\/h2>\n<p><iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/N-OvnVdZP_8?si=jhrDor6Cv6vU6dBP\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<p>Pro\u010d na tom z\u00e1le\u017e\u00ed? I velmi mal\u00e1 zm\u011bna dr\u00e1hy m\u016f\u017ee m\u00edt v dlouh\u00e9m \u010dasov\u00e9m horizontu obrovsk\u00fd efekt. Pokud bychom podobn\u00fd z\u00e1sah provedli u asteroidu, kter\u00fd by m\u00ed\u0159il k Zemi \u2013 a ud\u011blali to dostate\u010dn\u011b v\u010das \u2013 mohli bychom ho odklonit tak, \u017ee by na\u0161i planetu minul. Mise DART tak p\u0159edstavuje d\u016fle\u017eit\u00fd krok k re\u00e1ln\u00e9 planet\u00e1rn\u00ed obran\u011b a ukazuje, \u017ee lidstvo m\u00e1 potenci\u00e1l aktivn\u011b se br\u00e1nit kosmick\u00fdm hrozb\u00e1m.<\/p>\n<p>Zdroje a dal\u0161\u00ed odkazy:<\/p>\n<p>&#8211; <a href=\"https:\/\/www.science.org\/doi\/10.1126\/sciadv.aea4259\">Detailn\u00ed \u010dl\u00e1nek na science.org<\/a><br \/>\n&#8211; <a href=\"https:\/\/www.jpl.nasa.gov\/news\/nasas-dart-mission-changed-orbit-of-asteroid-didymos-around-sun\/\">P\u0159\u00edsp\u011bvek na jpl.nasa.gov<\/a><br \/>\n&#8211; <a href=\"https:\/\/science.nasa.gov\/asteroids-comets-meteors\/\">Interaktivn\u00ed mapa asteroid\u016f<\/a><br \/>\n&#8211; <a href=\"https:\/\/dart.jhuapl.edu\/Gallery\/\">Obrazov\u00e1 dokumentace DART<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Mise NASA s n\u00e1zvem DART (Double Asteroid Redirection Test) m\u011bla jasn\u00fd c\u00edl: otestovat, jestli dok\u00e1\u017eeme zm\u011bnit dr\u00e1hu asteroidu pomoc\u00ed \u0159\u00edzen\u00e9ho n\u00e1razu kosmick\u00e9 sondy. V roce &#8230;. <\/p>\n","protected":false},"author":1,"featured_media":6514,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10,13],"tags":[67,17],"class_list":["post-6506","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-vesmir","category-zajimavosti","tag-historie","tag-video"],"_links":{"self":[{"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/posts\/6506","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=6506"}],"version-history":[{"count":11,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/posts\/6506\/revisions"}],"predecessor-version":[{"id":6518,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/posts\/6506\/revisions\/6518"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/media\/6514"}],"wp:attachment":[{"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6506"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6506"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6506"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}