{"id":2818,"date":"2024-07-01T00:04:47","date_gmt":"2024-06-30T22:04:47","guid":{"rendered":"https:\/\/www.zahadyazajimavosti.cz\/?p=2818"},"modified":"2024-07-03T15:07:46","modified_gmt":"2024-07-03T13:07:46","slug":"kde-ziji-mimozemstane","status":"publish","type":"post","link":"https:\/\/www.zahadyazajimavosti.cz\/index.php\/2024\/07\/01\/kde-ziji-mimozemstane\/","title":{"rendered":"Kde \u017eij\u00ed mimozem\u0161\u0165an\u00e9 ?"},"content":{"rendered":"

Vedle hled\u00e1n\u00ed kandid\u00e1t\u016f na domovy mimozemsk\u00fdch civilizac\u00ed jsou i jin\u00e9 n\u00e1zory.<\/strong>
\nV roce 2000 vy\u0161la kniha Petera Warda<\/em> (1) a Donalda Braunlee<\/em> (2) \u201eNa\u0161e jedin\u00e1 Zem\u011b\u201c<\/em> (3), ve kter\u00e9 se dokl\u00e1d\u00e1, \u017ee vznik \u017eivota na na\u0161\u00ed planet\u011b byl unik\u00e1tn\u00edm p\u0159\u00edpadem.<\/p>\n

I Slune\u010dn\u00ed soustava se nach\u00e1z\u00ed v takov\u00e9m p\u0159\u00edhodn\u00e9m prostoru, na sam\u00e9m okraji Galaxie.<\/p>\n

Kdyby bylo Slunce bl\u00ed\u017ee k centru, kde je v\u00edce hv\u011bzd a rozm\u00edst\u011bn\u00ed mezi nimi men\u0161\u00ed, byla by Zem\u011b vystavena smrtonosn\u00e9mu z\u00e1\u0159en\u00ed nov a supernov, a za\u010d\u00ednaj\u00edc\u00ed \u017eivot by byl zni\u010den v z\u00e1rodku. (4)<\/p>\n

A na druh\u00e9 stran\u011b \u2013 Zemi chr\u00e1n\u00ed zvn\u011bj\u0161ku gigantick\u00e9 planety \u2013 Jupiter a Saturn se sv\u00fdmi m\u011bs\u00edci, a tvo\u0159\u00ed tak gravita\u010dn\u00ed \u0161t\u00edt, p\u0159itahuj\u00edc\u00ed asteroidy a komety. Jinak by byla Zem\u011b vystavena neust\u00e1l\u00e9mu bombardov\u00e1n\u00ed, podobn\u00e9 tomu, kter\u00e9 zlikvidovalo dinosaury.<\/p>\n

Takov\u00e1 ochrana je u jin\u00fdch slunc\u00ed, podle dosavadn\u00edch objev\u016f 170 exoplanet, ojedin\u011bl\u00e1. V jin\u00fdch soustav\u00e1ch jsou pr\u00e1v\u011b nejv\u011bt\u0161\u00ed planety co nejbl\u00ed\u017ee mate\u0159sk\u00fdm hv\u011bzd\u00e1m. Planety podobn\u00e9 Zemi jsou d\u00e1le od centra, nejen bez gravita\u010dn\u00ed ochrany, ale i mimo \u017eivotod\u00e1rn\u00e9 teplo.<\/p>\n

Kandid\u00e1ti na existenci Zemi podobn\u00fdch planet a tedy i \u017eivota<\/p>\n

\u2022 Hv\u011bzda Beta Honic\u00edch ps\u016f \u2013 vzd\u00e1len\u00e1 26 ly (sv\u011bteln\u00fdch let). Podobn\u00e1 Slunci.
\n\u2022 Hv\u011bzda HD 10307 v souhv\u011bzd\u00ed Andromedy. Vzd\u00e1len\u00e1 42 ly. Hmotnost, teplota i chemick\u00fdm slo\u017een\u00ed prakticky identick\u00e1 na\u0161emu Slunci. K t\u00e9to hv\u011bzd\u011b zaslal Alexandr Zajcev v roce 2003 z Institutu radiofyziky RAV poselstv\u00ed. To znamen\u00e1, \u017ee na\u0161e poselstv\u00ed bude p\u0159\u00edpadn\u00fdmi mimozem\u0161\u0165any p\u0159ijato v roce 2045. Pokud se rozhodnou okam\u017eit\u011b odpov\u011bd\u011bt, dozv\u00edme se to v roce 2087.
\n\u2022 Hv\u011bzda HD 211415 \u2013 chladn\u011bj\u0161\u00ed, ale podobn\u00e1 Slunci.
\n\u2022 18 hv\u011bzda souhv\u011bzd\u00ed \u0160korpi\u00f3na \u2013 identick\u00e1 na\u0161emu Slunci. Hmotnost\u00ed je jen 3% li\u0161\u00ed, ale perioda aktivity je 11 let, jako u n\u00e1s. St\u00e1\u0159\u00ed 4,2 mld. let. Vzd\u00e1lenost od Zem\u011b \u2013 47,5 ly.
\n\u2022 Hv\u011bzda 51 souhv\u011bzd\u00ed Pegasu \u2013 vzd\u00e1len\u00e1 41 ly. V jej\u00edm okol\u00ed na\u0161li \u0161v\u00fdcar\u0161t\u00ed astronomov\u00e9 v roce 1995 prvn\u00ed exoplanetu, velkou jako Jupiter.<\/p>\n

Odkazy<\/strong><\/em><\/p>\n

(1) http:\/\/en.wikipedia.org\/wiki\/Peter_Ward_(paleontologist)<\/a> <\/em>
\n(2) http:\/\/en.wikipedia.org\/wiki\/Donald_E._Brownlee<\/a> <\/em>
\n(3) Ward, Peter D. – Brownlee, Donald: Rare Earth: Why Complex Life is Uncommon in the Universe. Copernicus Books (Springer Verlag 2000). ISBN 0-387-98701-0.<\/em>
\n(4) http:\/\/en.wikipedia.org\/wiki\/Rare_Earth_hypothesis<\/a><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

Vedle hled\u00e1n\u00ed kandid\u00e1t\u016f na domovy mimozemsk\u00fdch civilizac\u00ed jsou i jin\u00e9 n\u00e1zory.<\/p>\n","protected":false},"author":1,"featured_media":429,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17,19],"tags":[58,59],"class_list":["post-2818","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-veda","category-zahady","tag-mimozemstane","tag-vesmir"],"_links":{"self":[{"href":"https:\/\/www.zahadyazajimavosti.cz\/index.php\/wp-json\/wp\/v2\/posts\/2818","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.zahadyazajimavosti.cz\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zahadyazajimavosti.cz\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zahadyazajimavosti.cz\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zahadyazajimavosti.cz\/index.php\/wp-json\/wp\/v2\/comments?post=2818"}],"version-history":[{"count":1,"href":"https:\/\/www.zahadyazajimavosti.cz\/index.php\/wp-json\/wp\/v2\/posts\/2818\/revisions"}],"predecessor-version":[{"id":2819,"href":"https:\/\/www.zahadyazajimavosti.cz\/index.php\/wp-json\/wp\/v2\/posts\/2818\/revisions\/2819"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.zahadyazajimavosti.cz\/index.php\/wp-json\/wp\/v2\/media\/429"}],"wp:attachment":[{"href":"https:\/\/www.zahadyazajimavosti.cz\/index.php\/wp-json\/wp\/v2\/media?parent=2818"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zahadyazajimavosti.cz\/index.php\/wp-json\/wp\/v2\/categories?post=2818"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zahadyazajimavosti.cz\/index.php\/wp-json\/wp\/v2\/tags?post=2818"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}