{"id":67441,"date":"2020-02-13T16:42:16","date_gmt":"2020-02-13T14:42:16","guid":{"rendered":"http:\/\/www.btv.md\/?p=67441"},"modified":"2020-02-13T16:42:16","modified_gmt":"2020-02-13T14:42:16","slug":"pe-titan-satelit-al-lui-saturn-cel-mai-probabil-nu-exista-viata-desi-seamana-cel-mai-mult-cu-planeta-noastra","status":"publish","type":"post","link":"https:\/\/www.btv.md\/ro\/pe-titan-satelit-al-lui-saturn-cel-mai-probabil-nu-exista-viata-desi-seamana-cel-mai-mult-cu-planeta-noastra\/","title":{"rendered":"Pe Titan, satelit al lui Saturn, cel mai probabil nu exist\u0103 via\u021b\u0103, de\u0219i seam\u0103n\u0103 cel mai mult cu planeta noastr\u0103"},"content":{"rendered":"<p><strong>Existen\u0163a vie\u0163ii pe Titan, satelitul planetei Saturn care din anumite puncte de vedere este uluitor de similar P\u0103m\u00e2ntului, este improbabil\u0103, conform concluziilor unui test care apeleaz\u0103 la mecanica cuantic\u0103, transmite miercuri Live Science.<\/strong><\/p>\n<p>Titan, pe locul doi \u00een topul celor mai mari sateli\u0163i din Sistemul Solar dup\u0103 Ganymede, lun\u0103 a planetei Jupiter, este o lume unic\u0103 din dou\u0103 motive care i-au f\u0103cut pe cercet\u0103tori s\u0103 cread\u0103 c\u0103 la suprafa\u0163a sa ar putea exista via\u0163\u0103: este singura lun\u0103 din Sistemul Solar cu o atmosfer\u0103 dens\u0103 \u015fi, totodat\u0103, singurul corp cosmic din Sistemul Solar, \u00een afar\u0103 de P\u0103m\u00e2nt, la suprafa\u0163a c\u0103ruia exist\u0103 m\u0103ri, lacuri \u015fi r\u00e2uri. \u00cen cazul lui Titan \u00eens\u0103, este vorba de m\u0103ri, lacuri \u015fi r\u00e2uri de hidrocarburi la temperaturi foarte sc\u0103zute, care au o compozi\u0163ie care le face s\u0103 fie mai apropiate de benzin\u0103 dec\u00e2t de oceanele terestre. \u00cens\u0103 unii cercet\u0103tori au avansat ipoteze conform c\u0103rora \u00een aceste lacuri de hidrocarburi pot ap\u0103rea structuri complexe \u2013 bule cu anumite propriet\u0103\u0163i speciale, similare celor premerg\u0103toare vie\u0163ii pe P\u0103m\u00e2nt.<\/p>\n<p>Pe P\u0103m\u00e2nt, moleculele lipidice (acizi gra\u015fi) se pot aranja \u00een mod spontan \u00een membrane \u00een form\u0103 de bule care formeaz\u0103 bariere protectoare \u00een jurul celulelor tuturor organismelor vii. Unii cercet\u0103tori sunt de p\u0103rere c\u0103 aceasta a fost prima condi\u0163ie sine qua non pentru apari\u0163ia vie\u0163ii pe P\u0103m\u00e2nt.<\/p>\n<p>\u00cen cazul lui Titan, ar fi putut s\u0103 apar\u0103 un tip echivalent de bule, \u00eens\u0103 nu formate din molecule lipidice ci din molecule pe baz\u0103 de azot (nitrogen), ce au fost denumite \u201cazotosome\u201d (corpuri din azot).<\/p>\n<p>\u00cens\u0103, pentru ca astfel de structuri s\u0103 se formeze \u00een mod natural, trebuie ca anumite condi\u0163ii s\u0103 fie ideale, ceea ce este greu de ob\u0163inut pe Titan, unde temperatura medie este de aproximativ -185 de grade Celsius, \u015fi \u00een absen\u0163a apei \u015fi a oxigenului atmosferic.<br \/>\nStudii anterioare, ce au apelat la simul\u0103ri ale dinamicii moleculare \u2013 o tehnic\u0103 folosit\u0103 des pentru a studia chimia vie\u0163ii \u2013 sugerau c\u0103 astfel de structuri de forma unor bule ar putea s\u0103 se formeze \u015fi s\u0103 devin\u0103 prezen\u0163e comune pe Titan. \u00cens\u0103 un nou studiu, publicat la 24 ianuarie \u00een revista Science Advances, sugereaz\u0103 c\u0103 aceste simul\u0103ri anterioare au fost eronate.<\/p>\n<p>Sursa:<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Existen\u0163a vie\u0163ii pe Titan, satelitul planetei Saturn care din anumite puncte de vedere este uluitor de similar P\u0103m\u00e2ntului, este improbabil\u0103, conform concluziilor unui test care apeleaz\u0103 la mecanica cuantic\u0103, transmite miercuri Live Science. Titan, pe locul doi \u00een topul celor mai mari sateli\u0163i din Sistemul Solar dup\u0103 Ganymede, lun\u0103 a planetei Jupiter, este o lume [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":67444,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6349],"tags":[10504,10507,10505,10503,10506,10502,10501],"class_list":["post-67441","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-social","tag-nu-exista-viata","tag-pamant-ro","tag-planeta-noastra","tag-probabillitate","tag-satelit-ro","tag-saturn","tag-titan"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Pe Titan, satelit al lui Saturn, cel mai probabil nu exist\u0103 via\u021b\u0103, de\u0219i seam\u0103n\u0103 cel mai mult cu planeta noastr\u0103 - BTV<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.btv.md\/ro\/pe-titan-satelit-al-lui-saturn-cel-mai-probabil-nu-exista-viata-desi-seamana-cel-mai-mult-cu-planeta-noastra\/\" \/>\n<meta property=\"og:locale\" content=\"ro_RO\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pe Titan, satelit al lui Saturn, cel mai probabil nu exist\u0103 via\u021b\u0103, de\u0219i seam\u0103n\u0103 cel mai mult cu planeta noastr\u0103 - BTV\" \/>\n<meta property=\"og:description\" content=\"Existen\u0163a vie\u0163ii pe Titan, satelitul planetei Saturn care din anumite puncte de vedere este uluitor de similar P\u0103m\u00e2ntului, este improbabil\u0103, conform concluziilor unui test care apeleaz\u0103 la mecanica cuantic\u0103, transmite miercuri Live Science. 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