{"id":3929,"date":"2026-06-30T15:51:20","date_gmt":"2026-06-30T15:51:20","guid":{"rendered":"https:\/\/astrohodonin.cz\/index.php\/2026\/06\/30\/neobvykle-hladke-useky-asteroidu-itokawa\/"},"modified":"2026-06-30T15:51:20","modified_gmt":"2026-06-30T15:51:20","slug":"neobvykle-hladke-useky-asteroidu-itokawa","status":"publish","type":"post","link":"https:\/\/astrohodonin.cz\/index.php\/2026\/06\/30\/neobvykle-hladke-useky-asteroidu-itokawa\/","title":{"rendered":"Neobvykle hladk\u00e9 \u00faseky asteroidu Itokawa"},"content":{"rendered":"<p>Pro\u010d jsou n\u011bkter\u00e9 \u010d\u00e1sti povrchu tohoto asteroidu tak hladk\u00e9? Odpov\u011b\u010f z\u0159ejm\u011b souvis\u00ed s dynamikou asteroidu, kter\u00fd nen\u00ed pevnou horninou, ale volnou hromadou \u00falomk\u016f.  Neobvykl\u00fd asteroid Itokawa nav\u0161t\u00edvila v roce 2005 japonsk\u00e1 sonda Hayabusa, kter\u00e1 po\u0159\u00eddila sn\u00edmky a zdokumentovala jeho neobvyklou strukturu a z\u00e1hadn\u00fd nedostatek kr\u00e1ter\u016f.  Anal\u00fdzy p\u0159echodov\u00fdch oblast\u00ed mezi hladk\u00fdmi a \u010dlenit\u00fdmi \u00faseky nazna\u010duj\u00ed, \u017ee pohyb asteroidu by mohl zp\u016fsobovat odd\u011blov\u00e1n\u00ed velk\u00fdch a mal\u00fdch kamen\u016f bl\u00edzko povrchu, podobn\u011b jako u efektu brazilsk\u00fdch o\u0159ech\u016f.  Robotick\u00e1 sonda Hayabusa dokonce p\u0159ist\u00e1la na jedn\u00e9 z hladk\u00fdch ploch, nazvan\u00e9 \u201eMo\u0159e MUSES\u201c, a odebrala vzorky p\u016fdy. Tyto vzorky byly p\u0159ivezeny na Zemi a poskytuj\u00ed nejen stopy k d\u00e1vn\u00e9 historii tohoto neobvykl\u00e9ho asteroidu, ale tak\u00e9 k ran\u00fdm let\u016fm cel\u00e9 na\u0161\u00ed slune\u010dn\u00ed soustavy. Po\u010d\u00edta\u010dov\u00e9 simulace ukazuj\u00ed, \u017ee 500metrov\u00fd asteroid Itokawa by mohl v p\u0159\u00ed\u0161t\u00edch n\u011bkolika milionech let dopadnout na Zemi.   Rocking Space: Dnes je Den asteroid\u016f<\/p>\n<p><!-- astropress --><\/p>\n<p>**Credit**: NASA<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Pro\u010d jsou n\u011bkter\u00e9 \u010d\u00e1sti povrchu tohoto asteroidu tak hladk\u00e9? Odpov\u011b\u010f z\u0159ejm\u011b souvis\u00ed s dynamikou asteroidu, kter\u00fd nen\u00ed pevnou horninou, ale volnou hromadou \u00falomk\u016f. Neobvykl\u00fd asteroid Itokawa nav\u0161t\u00edvila v roce 2005 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3930,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3929","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nasa"],"_links":{"self":[{"href":"https:\/\/astrohodonin.cz\/index.php\/wp-json\/wp\/v2\/posts\/3929","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/astrohodonin.cz\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/astrohodonin.cz\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/astrohodonin.cz\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/astrohodonin.cz\/index.php\/wp-json\/wp\/v2\/comments?post=3929"}],"version-history":[{"count":0,"href":"https:\/\/astrohodonin.cz\/index.php\/wp-json\/wp\/v2\/posts\/3929\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/astrohodonin.cz\/index.php\/wp-json\/wp\/v2\/media\/3930"}],"wp:attachment":[{"href":"https:\/\/astrohodonin.cz\/index.php\/wp-json\/wp\/v2\/media?parent=3929"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/astrohodonin.cz\/index.php\/wp-json\/wp\/v2\/categories?post=3929"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/astrohodonin.cz\/index.php\/wp-json\/wp\/v2\/tags?post=3929"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}