{"id":15405,"date":"2022-03-13T13:00:04","date_gmt":"2022-03-13T13:00:04","guid":{"rendered":"https:\/\/www.lifescienceart.com\/?p=15405"},"modified":"2022-03-13T13:00:04","modified_gmt":"2022-03-13T13:00:04","slug":"earths-water-origin-solar-nebula","status":"publish","type":"post","link":"https:\/\/www.lifescienceart.com\/cs\/science\/space-science\/earths-water-origin-solar-nebula\/","title":{"rendered":"Odkud poch\u00e1z\u00ed voda na Zemi? Slune\u010dn\u00ed mlhovina, p\u0159ekvapiv\u00fd zdroj"},"content":{"rendered":"<h2 class=\"wp-block-heading\">Odkud poch\u00e1z\u00ed voda na Zemi?<\/h2>\n\n<h3 class=\"wp-block-heading\">Slune\u010dn\u00ed mlhovina: Nov\u00fd zdroj vody na Zemi<\/h3>\n\n<p>Po cel\u00e1 desetilet\u00ed v\u011bdci v\u011b\u0159ili, \u017ee voda na Zemi poch\u00e1z\u00ed z ledem napln\u011bn\u00fdch komet a asteroid\u016f. Nov\u00fd v\u00fdzkum v\u0161ak nazna\u010duje, \u017ee slune\u010dn\u00ed mlhovina, oblak plynu a prachu, kter\u00e9 vznikly po zrozen\u00ed Slunce, mohla tak\u00e9 sehr\u00e1t svou roli.<\/p>\n\n<p>Chemick\u00e9 slo\u017een\u00ed vody je jednoduch\u00e9: dv\u011b \u010d\u00e1sti vod\u00edku a jedna \u010d\u00e1st kysl\u00edku. Vod\u00edk je hojn\u00fd ve vesm\u00edru, tak\u017ee jak\u00fdkoli zdroj vod\u00edku by mohl p\u0159isp\u011bt k vod\u011b na Zemi.<\/p>\n\n<h3 class=\"wp-block-heading\">Vod\u00edk ze slune\u010dn\u00ed mlhoviny<\/h3>\n\n<p>Vod\u00edkov\u00fd plyn ve slune\u010dn\u00ed mlhovin\u011b byl b\u011bhem jejich vzniku zabudov\u00e1n do planet. V\u011bt\u0161ina tohoto vod\u00edku z\u016fst\u00e1v\u00e1 zachycena v zemsk\u00e9m j\u00e1dru, ale \u010d\u00e1st unikla a p\u0159isp\u011bla ke stavebn\u00edm kamen\u016fm molekul vody. Tento vod\u00edk m\u00e1 ni\u017e\u0161\u00ed pom\u011br deuteria, t\u011b\u017ek\u00e9ho izotopu vod\u00edku, k b\u011b\u017en\u00e9mu vod\u00edku ne\u017e voda z asteroid\u016f nebo komet.<\/p>\n\n<h3 class=\"wp-block-heading\">Vodou napln\u011bn\u00e9 asteroidy a interakce se slune\u010dn\u00ed mlhovinou<\/h3>\n\n<p>Na po\u010d\u00e1tku historie Zem\u011b se do sebe srazily vodou napln\u011bn\u00e9 asteroidy a vytvo\u0159ily planet\u00e1rn\u00ed embrya s vn\u011bj\u0161\u00ed vrstvou magmatu. Vod\u00edkem t\u011b\u017ek\u00fd plyn ze slune\u010dn\u00ed mlhoviny se setkal s t\u00edmto magmatem, vytvo\u0159il atmosf\u00e9ru a poslal rozpu\u0161t\u011bn\u00fd vod\u00edk do nitra embry\u00ed.<\/p>\n\n<h3 class=\"wp-block-heading\">Izotopick\u00e1 frakcionace a distribuce vody na Zemi<\/h3>\n\n<p>Izotopick\u00e1 frakcionace zp\u016fsobila, \u017ee se norm\u00e1ln\u00ed vod\u00edk posunul hloub\u011bji do j\u00e1dra, zat\u00edmco izotopy deuteria z\u016fstaly v pl\u00e1\u0161ti. Jak se Zem\u011b slu\u010dovala s jin\u00fdmi vesm\u00edrn\u00fdmi t\u011blesy, z\u00edskala dostatek vody a hmoty, aby dos\u00e1hla sv\u00e9 kone\u010dn\u00e9 velikosti.<\/p>\n\n<h3 class=\"wp-block-heading\">V\u00fdznam vod\u00edku ze slune\u010dn\u00ed mlhoviny<\/h3>\n\n<p>Dopady asteroid\u016f vytvo\u0159ily v\u011bt\u0161inu vody na Zemi, ale mal\u00e1 \u010d\u00e1st pobl\u00ed\u017e j\u00e1dra se zd\u00e1 poch\u00e1zet ze slune\u010dn\u00ed mlhoviny. Tento objev nazna\u010duje, \u017ee i planety daleko od vodou bohat\u00fdch asteroid\u016f mohou m\u00edt vodu.<\/p>\n\n<h3 class=\"wp-block-heading\">Implikace pro obyvatelnost exoplanet<\/h3>\n\n<p>Zji\u0161t\u011bn\u00ed t\u00fdmu by mohla v\u011bdc\u016fm pomoci l\u00e9pe porozum\u011bt obyvatelnosti dal\u0161\u00edch planet. Nazna\u010duj\u00ed, \u017ee planety mohou m\u00edt \u201edno\u201c vody bez ohledu na jejich vzd\u00e1lenost od zdroj\u016f vody. To podporuje my\u0161lenku rychl\u00e9ho r\u016fstu planety a potenci\u00e1l \u017eivota na jin\u00fdch sv\u011btech.<\/p>\n\n<h3 class=\"wp-block-heading\">Dal\u0161\u00ed poznatky<\/h3>\n\n<ul class=\"wp-block-list\">\n<li>Voda nalezen\u00e1 hluboko uvnit\u0159 Zem\u011b m\u00e1 jin\u00fd pom\u011br t\u011b\u017ek\u00fdch izotop\u016f vod\u00edku a norm\u00e1ln\u00edho vod\u00edku, co\u017e nazna\u010duje samostatn\u00fd bod p\u016fvodu od asteroid\u016f a komet.<\/li>\n<li>Plyn ze slune\u010dn\u00ed mlhoviny p\u0159isp\u011bl k vytvo\u0159en\u00ed jedn\u00e9 ze sta molekul vody na Zemi.<\/li>\n<li>Voda na Zemi je pravd\u011bpodobn\u011b kombinac\u00ed zdroj\u016f, v\u010detn\u011b asteroid\u016f, komet a slune\u010dn\u00ed mlhoviny.<\/li>\n<li>P\u0159\u00edtomnost vod\u00edku ze slune\u010dn\u00ed mlhoviny ve vod\u011b na Zemi m\u00e1 d\u016fsledky pro pochopen\u00ed obyvatelnosti dal\u0161\u00edch planet.<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Odkud poch\u00e1z\u00ed voda na Zemi? Slune\u010dn\u00ed mlhovina: Nov\u00fd zdroj vody na Zemi Po cel\u00e1 desetilet\u00ed v\u011bdci v\u011b\u0159ili, \u017ee voda na Zemi poch\u00e1z\u00ed z ledem napln\u011bn\u00fdch komet a asteroid\u016f. Nov\u00fd v\u00fdzkum&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[476],"tags":[982,20512,2309,20510,3353,20511,2716],"class_list":["post-15405","post","type-post","status-publish","format-standard","hentry","category-space-science","tag-exoplanets","tag-isotopes","tag-habitability","tag-solar-nebula","tag-water","tag-hydrogen","tag-earth"],"_links":{"self":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/15405","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=15405"}],"version-history":[{"count":1,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/15405\/revisions"}],"predecessor-version":[{"id":15406,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/15405\/revisions\/15406"}],"wp:attachment":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/media?parent=15405"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/categories?post=15405"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/tags?post=15405"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}