{"id":953,"date":"2004-11-19T08:31:00","date_gmt":"2004-11-19T07:31:00","guid":{"rendered":"https:\/\/kids.esa.int\/telltale_signs\/"},"modified":"2026-10-08T00:34:10","modified_gmt":"2026-10-07T22:34:10","slug":"telltale_signs","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/cs\/telltale_signs\/","title":{"rendered":"Z\u0159eteln\u00e9 zn\u00e1mky"},"content":{"rendered":"
\n

Zem\u011b je jedin\u00e9 m\u00edsto, o kter\u00e9m v\u00edme, \u017ee umo\u017e\u0148uje existenci \u017eivota. \u010c\u00edm je tak v\u00fdjime\u010dn\u00e1? Jedn\u00edm z kl\u00ed\u010dov\u00fdch faktor\u016f je p\u0159\u00edtomnost kapaln\u00e9 vody. Zd\u00e1 se, \u017ee \u017eivot na Zemi vznikl v jez\u00edrk\u00e1ch nebo mo\u0159\u00edch. \u017d\u00e1dn\u00fd \u017eivot na na\u0161\u00ed planet\u011b nem\u016f\u017ee bez vody p\u0159e\u017e\u00edt.<\/p>\n<\/div>\n

Zem\u011b je jedin\u00fdm m\u00edstem v na\u0161\u00ed slune\u010dn\u00ed soustav\u011b, kde se na povrchu nach\u00e1zej\u00ed rozs\u00e1hl\u00e9 oce\u00e1ny. Je to proto, \u017ee le\u017e\u00ed v takzvan\u00e9 \u2018Goldilocksov\u011b\u2019 z\u00f3n\u011b.<\/p>\n

Venu\u0161e je p\u0159\u00edli\u0161 bl\u00edzko Slunci a p\u0159\u00edli\u0161 hork\u00e1. Mars je p\u0159\u00edli\u0161 daleko a p\u0159\u00edli\u0161 chladn\u00fd. Zem\u011b je pr\u00e1v\u011b ve spr\u00e1vn\u00e9 vzd\u00e1lenosti a m\u00e1 spr\u00e1vnou teplotu.<\/p>\n

Mohly by existovat \u2018Zem\u011b\u2019 ob\u00edhaj\u00edc\u00ed kolem jin\u00fdch hv\u011bzd? Jak bychom je poznali? Nejprve je t\u0159eba zm\u011b\u0159it, jak hork\u00e1 nebo studen\u00e1 je dan\u00e1 planeta. M\u011bli bychom tak\u00e9 m\u00edt d\u016fkazy o tom, \u017ee se na n\u00ed vyskytuje voda v hojn\u00e9m mno\u017estv\u00ed.<\/p>\n

Pak mus\u00edme hledat plyny, jako je kysl\u00edk a metan. Tyto plyny se uvol\u0148uj\u00ed do ovzdu\u0161\u00ed \u017eiv\u00fdmi organismy.<\/p>\n

Budouc\u00ed mise budou tyto \u2018biomarkery\u2019 hledat v tis\u00edc\u00edch hv\u011bzdn\u00fdch soustav. A\u010dkoli nebudou p\u0159\u00edmo detekovat kysl\u00edk, \u2018zaznamenaj\u00ed\u2019 ozon, co\u017e je jedna z forem kysl\u00edku. Zaznamenaj\u00ed tak\u00e9 oxid uhli\u010dit\u00fd, vodu a v n\u011bkter\u00fdch p\u0159\u00edpadech i metan.<\/p>","protected":false},"excerpt":{"rendered":"

Earth is the only place we know that supports life. What makes it so special? One key factor is the presence of liquid water. Life on Earth seems to have […]<\/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\/2002\/01\/planet_earth_as_seen_by_the_apollo_17_astronauts2\/17863973-3-eng-GB\/Planet_Earth_as_seen_by_the_Apollo_17_astronauts.jpg","esa_banner_description":"Planet Earth as seen by the Apollo 17 astronauts","esa_banner_credit":"NASA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2002\/01\/Planet_Earth_as_seen_by_the_Apollo_17_astronauts2","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":[14,10,13],"tags":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-953","post","type-post","status-publish","format-standard","hentry","category-are-we-alone","category-learn","category-life-in-space","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/posts\/953","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=953"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/posts\/953\/revisions"}],"predecessor-version":[{"id":2096,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/posts\/953\/revisions\/2096"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/media?parent=953"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/categories?post=953"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/tags?post=953"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/panel?post=953"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/language?post=953"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/age?post=953"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/duration?post=953"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/resource_type?post=953"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/audience?post=953"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/wf_post_folders?post=953"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}