Pallas, jeden z nejzn\u00e1m\u011bj\u0161\u00edch asteroid\u016f v na\u0161\u00ed slune\u010dn\u00ed soustav\u011b, byl zachycen v ohromuj\u00edc\u00edch detailech astronomy pomoc\u00ed p\u0159\u00edstroje SPHERE na dalekohledu VLT (Very Large Telescope) Evropsk\u00e9 ji\u017en\u00ed observato\u0159e. Sn\u00edmky odhaluj\u00ed pozoruhodn\u00fd pohled: Pallas je nejv\u00edce pokryt\u00fd kr\u00e1tery objekt v p\u00e1su asteroid\u016f, co\u017e je titul, kter\u00fd si pravd\u011bpodobn\u011b vyslou\u017eil d\u00edky nes\u010detn\u00fdm koliz\u00edm se sv\u00fdmi sousedy.<\/p>\n\n
\u201eTyto prvn\u00ed detailn\u00ed sn\u00edmky Pallasu nazna\u010duj\u00ed, \u017ee asteroid m\u00e1 n\u00e1silnou minulost,\u201c \u0159ekl Franck Marchis, planet\u00e1rn\u00ed v\u011bdec na MIT a spoluautor studie publikovan\u00e9 v Nature Astronomy.<\/p>\n\n
Zat\u00edmco v\u011bt\u0161ina asteroid\u016f v p\u00e1su ob\u00edh\u00e1 po podobn\u00e9 dr\u00e1ze kolem Slunce, Pallas zauj\u00edm\u00e1 sp\u00ed\u0161e dareb\u00e1ck\u00fd p\u0159\u00edstup. Jeho naklon\u011bn\u00e1 ob\u011b\u017en\u00e1 dr\u00e1ha ho p\u0159iv\u00e1d\u00ed ke koliz\u00edm v p\u00e1su v nep\u0159\u00edjemn\u00e9m \u00fahlu, co\u017e zvy\u0161uje pravd\u011bpodobnost sr\u00e1\u017eek.<\/p>\n\n
\u201ePallas za\u017e\u00edv\u00e1 dva- a\u017e t\u0159ikr\u00e1t v\u00edce koliz\u00ed ne\u017e Ceres nebo Vesta,\u201c dva nejv\u011bt\u0161\u00ed objekty v p\u00e1su asteroid\u016f, \u0159ekl Micha\u00ebl Marsset, planet\u00e1rn\u00ed v\u011bdec na MIT a spoluautor studie.<\/p>\n\n
St\u00e1l\u00e9 bombardov\u00e1n\u00ed zanechalo na Pallasu t\u011b\u017ek\u00e9 jizvy a vyslou\u017eilo mu p\u0159ezd\u00edvku \u201easteroid jako golfov\u00fd m\u00ed\u010dek\u201c. Anal\u00fdza sn\u00edmk\u016f po\u0159\u00edzen\u00fdch SPHERE uk\u00e1zala, \u017ee kr\u00e1tery tvo\u0159\u00ed nejm\u00e9n\u011b 10 % povrchu asteroidu.<\/p>\n\n
N\u00e1razy, kter\u00e9 Pallas za\u017e\u00edv\u00e1, jsou mimo\u0159\u00e1dn\u011b siln\u00e9. Po\u010d\u00edta\u010dov\u00e9 simulace uk\u00e1zaly, \u017ee t\u011blesa zodpov\u011bdn\u00e1 za kr\u00e1tery cestovala rychlost\u00ed p\u0159es 25 000 mil za hodinu, t\u00e9m\u011b\u0159 dvakr\u00e1t rychleji, ne\u017e je typick\u00e9 pro kolize v p\u00e1su asteroid\u016f.<\/p>\n\n
Alespo\u0148 36 z prohlubn\u00ed na Pallasu m\u00e1 pr\u016fm\u011br nejm\u00e9n\u011b 18 mil, v\u010detn\u011b jednoho masivn\u00edho kr\u00e1teru, kter\u00fd se t\u00e1hne p\u0159es 250 mil. Tento kr\u00e1ter je pravd\u011bpodobn\u011b v\u00fdsledkem sr\u00e1\u017eky s objektem o \u0161\u00ed\u0159ce a\u017e 25 mil.<\/p>\n\n
N\u00e1razu, kter\u00fd vytvo\u0159il tento kr\u00e1ter, m\u016f\u017ee b\u00fdt tak\u00e9 p\u0159i\u010d\u00edt\u00e1na skupina men\u0161\u00edch objekt\u016f, kter\u00e9 Pallas n\u00e1sleduj\u00ed. Pot\u00e9, co p\u0159ed asi 1,7 miliardami let narazil na asteroid, mohl se t\u011bleso rozb\u00edt na fragmenty, kter\u00e9 se vzn\u00e1\u0161ely do vesm\u00edru a nyn\u00ed n\u00e1sleduj\u00ed sv\u00e9ho v\u016fdce.<\/p>\n\n
\u201eProto\u017ee nyn\u00ed dok\u00e1\u017eeme vid\u011bt povrch velk\u00fdch asteroid\u016f v hlavn\u00edm p\u00e1su, m\u00e1me p\u0159\u00edstup k fiktivn\u00ed knize o historii na\u0161\u00ed slune\u010dn\u00ed soustavy,\u201c \u0159ekl Marsset. \u201eU\u010d\u00edme se, jak ji \u010d\u00edst, a ka\u017ed\u00e1 str\u00e1nka je pro n\u00e1s p\u0159ekvapen\u00edm, v\u010detn\u011b Pallasu.\u201c<\/p>\n\n
Studiem Pallasu a dal\u0161\u00edch asteroid\u016f z\u00edsk\u00e1vaj\u00ed v\u011bdci lep\u0161\u00ed p\u0159edstavu o n\u00e1siln\u00fdch a chaotick\u00fdch po\u010d\u00e1tc\u00edch na\u0161\u00ed slune\u010dn\u00ed soustavy. Tato nebesk\u00e1 t\u011blesa poskytuj\u00ed vod\u00edtka k proces\u016fm, kter\u00e9 formovaly na\u0161i planetu, a k potenci\u00e1ln\u00edm nebezpe\u010d\u00edm, kter\u00e1 ve vesm\u00edru st\u00e1le existuj\u00ed.<\/p>","protected":false},"excerpt":{"rendered":"
Pallas: Nejv\u00edce pokryt\u00fd kr\u00e1tery objekt v p\u00e1su asteroid\u016f Odhalen\u00e1 n\u00e1siln\u00e1 minulost Pallas, jeden z nejzn\u00e1m\u011bj\u0161\u00edch asteroid\u016f v na\u0161\u00ed slune\u010dn\u00ed soustav\u011b, byl zachycen v ohromuj\u00edc\u00edch detailech astronomy pomoc\u00ed p\u0159\u00edstroje SPHERE na…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[437],"tags":[6166,17018,435,17017,473,17019,1173,97,1232],"class_list":["post-12594","post","type-post","status-publish","format-standard","hentry","category-astronomy","tag-asteroid","tag-golf-ball-asteroid","tag-astronomy","tag-crater","tag-nasa","tag-pallas","tag-solar-system","tag-science","tag-space"],"_links":{"self":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/12594","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/comments?post=12594"}],"version-history":[{"count":1,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/12594\/revisions"}],"predecessor-version":[{"id":12595,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/12594\/revisions\/12595"}],"wp:attachment":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/media?parent=12594"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/categories?post=12594"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/tags?post=12594"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}