{"id":63768,"date":"2019-09-04T13:25:27","date_gmt":"2019-09-04T10:25:27","guid":{"rendered":"https:\/\/www.lovendal.ro\/wp52\/?p=63768"},"modified":"2019-09-04T13:25:27","modified_gmt":"2019-09-04T10:25:27","slug":"unde-sunt-extraterestrii-de-ce-nu-i-am-vazut-pana-acum-patru-explicatii-uluitoare","status":"publish","type":"post","link":"https:\/\/www.lovendal.ro\/wp52\/unde-sunt-extraterestrii-de-ce-nu-i-am-vazut-pana-acum-patru-explicatii-uluitoare\/","title":{"rendered":"Unde sunt extratere\u015ftrii? De ce nu i-am v\u0103zut p\u00e2n\u0103 acum? Patru explica\u0163ii uluitoare&#8230;"},"content":{"rendered":"<figure id=\"attachment_63769\" aria-describedby=\"caption-attachment-63769\" style=\"width: 335px\" class=\"wp-caption alignleft\"><a href=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2019\/09\/extraterestri.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-63769\" src=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2019\/09\/extraterestri.jpg\" alt=\"\" width=\"345\" height=\"282\" srcset=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2019\/09\/extraterestri.jpg 345w, https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2019\/09\/extraterestri-300x245.jpg 300w\" sizes=\"auto, (max-width: 345px) 100vw, 345px\" \/><\/a><figcaption id=\"caption-attachment-63769\" class=\"wp-caption-text\"><strong>Foto:<\/strong> <a href=\"https:\/\/www.flickr.com\/photos\/87249144@N08\/44248511775\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>flickr.com<\/strong><\/a> (Commons Creative &#8211; free)<\/figcaption><\/figure>\n<p>P\u0103m\u00e2ntul poate p\u0103rea un loc minunat \u00een acest Univers, pentru a sus\u0163ine via\u0163a, dar el este practic un gr\u0103unte \u00eentr-o cantitate imens\u0103 de nisip, c\u0103ci peste 200 de miliarde de galaxii se g\u0103se\u015fte \u00een acest Cosmos. \u015ei g\u00e2ndi\u0163i-v\u0103 c\u0103 fiecare galaxie poate avea sute de miliarde de stele. A\u015fadar, n-ar fi exclus ca \u015fi alte civiliza\u0163ii extraterestre s\u0103 existe \u00een tot acest vast Univers. Dar cum de nu am auzit de extratere\u015ftri p\u00e2n\u0103 acum, cel pu\u0163in din punct de vedere teoretic? Aceast\u0103 \u00eentrebare a devenit cunoscut\u0103 sub numele de paradoxul Fermi. Numit dup\u0103 fizicianul italian-american Enrico Fermi, paradoxul descrie aparenta contradic\u021bie \u00eentre poten\u021bialul vie\u021bii inteligente din Cosmos \u0219i faptul c\u0103 nu i-am detectat \u00eenc\u0103 pe extratere\u015ftri.<\/p>\n<p>Al\u021bi oameni de \u0219tiin\u021b\u0103 precum Frank Drake au \u00eencercat s\u0103 cuantifice probabilitatea statistic\u0103 a vie\u021bii existente \u00een alt\u0103 parte a Universului. Lu\u00e2nd \u00een considerare factori cum ar fi num\u0103rul estimat de stele asem\u0103n\u0103toare Soarelui, planete locuibile asem\u0103n\u0103toare P\u0103m\u00e2ntului \u0219i gradul de apari\u0163ie a vie\u021bii care se dezvolt\u0103 \u00een acele planete, ecua\u021bia Drake estimeaz\u0103 c\u0103 ar putea exista \u00eentre 1.000 \u0219i 100.000.000 de civiliza\u021bii extraterestre avansate numai \u00een galaxia noastr\u0103, Calea Lactee.<\/p>\n<p>Deci, unde sunt extratere\u015ftri? De ce nu-i vedem? Iat\u0103 c\u00e2teva explica\u021bii posibile.<\/p>\n<p><strong>Este nevoie de mul timp \u0219i spa\u021biu<\/strong><\/p>\n<p>O explica\u021bie obi\u0219nuit\u0103 a paradoxului Fermi este acela c\u0103 dureaz\u0103 mult timp pentru ca orice semnal descifrabil s\u0103 c\u0103l\u0103toreasc\u0103 prin Cosmos. De asemenea, este nevoie de timp (miliarde de ani cel pu\u0163in) pentru ca orice specie s\u0103 devin\u0103 suficient de avansat\u0103 pentru comunicarea interstelar\u0103, c\u0103l\u0103toria spa\u021bial\u0103 intergalactic\u0103 \u0219i posibila colonizare. Este posibil ca semnalele lor s\u0103 nu fi ajuns la noi. Av\u00e2nd \u00een vedere dimensiunea Universului \u0219i ritmul evolu\u021biei, este posibil s\u0103 avem nevoie pur \u0219i simplu de r\u0103bdare.<\/p>\n<p><strong>Dificult\u0103\u021bi tehnice: nu le putem citi semnalele<\/strong><\/p>\n<p>Majoritatea filmelor de la Hollywood \u00eei \u00eenf\u0103\u0163i\u015feaz\u0103 \u00een mod tradi\u021bional pe extratere\u015ftri ca fiind fiin\u0163e destul de umane sau asem\u0103n\u00e2ndu-se cu alte specii de pe P\u0103m\u00e2nt. Cu toate acestea, nu avem niciun motiv s\u0103 presupunem c\u0103 via\u021ba din alt\u0103 parte a Universului ar parcurge aceea\u0219i cale de evolu\u021bie ca a noastr\u0103. Nu exist\u0103 niciun motiv ca via\u021ba s\u0103 arate a\u0219a cum o \u0219tim noi. A antropomorfiza ideea de fiin\u021be extraterestre este un e\u0219ec al inteligen\u021bei.<\/p>\n<p>\u00cen timp ce organiza\u021biile precum SETI s-au concentrat pe trimiterea \u0219i detectarea semnalelor radio, s-ar putea ca speciile extraterestre s\u0103 fi adoptat o abordare tehnic\u0103 complet diferit\u0103. Este posibil ca alte civiliza\u021bii avansate s\u0103 trimit\u0103 semnale, dar nu avem tehnologia pentru a le detecta sau descifra, \u00eentruc\u00e2t acestea sunt dincolo de \u00een\u021belegerea noastr\u0103 actual\u0103 despre fizic\u0103. Limbajul, matematica, realit\u0103\u021bile, \u00een\u021belegerile \u0219tiin\u021bifice \u0219i con\u0219tiin\u021ba lor ar putea fi dincolo de orice ne putem imagina.<\/p>\n<p>\u015ei contrariul ar putea fi valabil; orice specie care ne-a detectat semnalele p\u00e2n\u0103 acum pur \u0219i simplu nu a fost \u00een m\u0103sur\u0103 s\u0103 le recunoasc\u0103 sau s\u0103 le descifreze ca provenind dintr-o alt\u0103 civiliza\u021bie.<\/p>\n<p><strong>Ei sunt deja aici<\/strong><\/p>\n<p>Una dintre ipotezele majore ale ideilor discutate p\u00e2n\u0103 acum este aceea c\u0103 toate civiliza\u021biile avansate vor fi motivate s\u0103 exploreze \u0219i s\u0103 colonizeze Universul observabil. Tehnologiile extrem de avansate ar face ca fiin\u0163ele extraterestre s\u0103 fie \u00een stare s\u0103-\u015fi &#8222;uploadeze&#8221; mintea \u00een particule cuantice, care s\u0103 existe \u00een spa\u021biu-timp. Astfel de entit\u0103\u021bi extraterestre pot fi deja \u00een jurul nostru, dar sunt imposibil de detectat.<\/p>\n<p><strong>Ipoteza Zoo<br \/>\n<\/strong><\/p>\n<p>Sus\u021bin\u0103torii ipotezei Zoo sugereaz\u0103 c\u0103 extratere\u0219trii care sunt mai avansa\u021bi dec\u00e2t noi, nu numai c\u0103 ne observ\u0103 de departe, dar ne-au \u00eenchis \u00eentr-un fel de \u201ecu\u0219c\u0103 cereasc\u0103\u201d, l\u0103s\u00e2ndu-ne \u00een afara limitelor de orice alt\u0103 civiliza\u021bie avansat\u0103. Ei pot face acest lucru pentru a permite dezvoltarea biologic\u0103 \u0219i social\u0103 natural\u0103 a umanit\u0103\u021bii.<\/p>\n<p>Ipoteza Zoo sus\u021bine c\u0103 \u00een\u021belegerea noastr\u0103 despre Univers reprezint\u0103 o simpl\u0103 iluzie creat\u0103 de civiliza\u021biile extraterestre care au capacitatea de a manipula materia \u0219i energia. Cu alte cuvinte, ceea ce consider\u0103m o \u00een\u021belegere obiectiv\u0103 a Universului ar putea fi o iluzie subiectiv\u0103.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>P\u0103m\u00e2ntul poate p\u0103rea un loc minunat \u00een acest Univers, pentru a sus\u0163ine via\u0163a, dar el este practic un gr\u0103unte \u00eentr-o cantitate imens\u0103 de nisip, c\u0103ci peste 200 de miliarde de galaxii se g\u0103se\u015fte \u00een acest Cosmos. \u015ei g\u00e2ndi\u0163i-v\u0103 c\u0103 fiecare &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"Unde sunt extratere\u015ftrii? De ce nu i-am v\u0103zut p\u00e2n\u0103 acum? Patru explica\u0163ii uluitoare&#8230;\" class=\"read-more button\" href=\"https:\/\/www.lovendal.ro\/wp52\/unde-sunt-extraterestrii-de-ce-nu-i-am-vazut-pana-acum-patru-explicatii-uluitoare\/#more-63768\" aria-label=\"Cite\u0219te mai multe despre Unde sunt extratere\u015ftrii? De ce nu i-am v\u0103zut p\u00e2n\u0103 acum? Patru explica\u0163ii uluitoare&#8230;\">Cititi mai multe<\/a><\/p>\n","protected":false},"author":1,"featured_media":63769,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11039],"tags":[102,2676,66,51,5735,348,2048,3014,433,1873,1015,1722,345,755,57,105,732,515,865,2501,733,789,1087,366],"class_list":["post-63768","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-astronomie","tag-astronomie","tag-constiinta","tag-energie","tag-extraterestri","tag-fermi","tag-fizica","tag-fizician","tag-frank-drake","tag-galaxie","tag-hollywood","tag-iluzie","tag-matematica","tag-materie","tag-minte","tag-oameni","tag-pamant","tag-planeta","tag-seti","tag-soare","tag-spatiu","tag-stea","tag-timp","tag-univers","tag-viata"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v23.3 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Unde sunt extratere\u015ftrii? 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