Hogyan lehets\u00e9ges h\u00e1t, hogy m\u00e9g soha, semmilyen bizony\u00edt\u00e9kot nem tal\u00e1lt az emberis\u00e9g m\u00e1s civiliz\u00e1ci\u00f3k l\u00e9tez\u00e9s\u00e9re. L\u00e9nyeg\u00e9ben ezt nevezik Fermi-paradoxonnak, aminek kapcs\u00e1n az \u00c9rdi Csillag\u00e1szati Klubban Keresztes Mikl\u00f3s besz\u00e9lt a F\u00f6ld\u00f6n k\u00edv\u00fcli civiliz\u00e1ci\u00f3kkal kapcsolatos kutat\u00e1sokr\u00f3l \u00e9s azok eredm\u00e9nytelens\u00e9g\u00e9r\u0151l.
\nForr\u00f3 t\u00e9ma volt ez mindig, Giordano Brun\u00f3t az\u00e9rt \u00e9gett\u00e9k el m\u00e1gly\u00e1n, mert els\u0151k\u00e9nt vetette f\u00f6l, hogy a csillagok lehetnek t\u00e1voli napok is, melyek k\u00f6r\u00fcl lakott bolyg\u00f3k keringhetnek. Term\u00e9szetesen az \u00e9rdekl\u0151d\u00e9s csak fokoz\u00f3dott a technika fejl\u0151d\u00e9s\u00e9vel, m\u00e9g speci\u00e1lisan az idegen civiliz\u00e1ci\u00f3kkal foglalkoz\u00f3 tudom\u00e1ny is kialakult: a SETI (Search for Extra-Terrestrial Intelligence, azaz a \u201ef\u00f6ld\u00f6n k\u00edv\u00fcli intelligencia keres\u00e9se\u201d).
\nNagy lend\u00fcletet az \u00f3ri\u00e1si r\u00e1di\u00f3t\u00e1vcs\u00f6vek meg\u00e9p\u00edt\u00e9s\u00e9vel vett a bizony\u00edt\u00e9kok keres\u00e9se. Az els\u0151 komolyabb k\u00eds\u00e9rletet 1960-ban folytatt\u00e1k, az \u00fagynevezett Ozma-terv keret\u00e9ben: k\u00e9t k\u00f6zeli, a Naphoz viszonylag hasonl\u00f3 csillag megfigyel\u00e9se folyt egy r\u00e1di\u00f3t\u00e1vcs\u0151vel, azt\u00e1n 1963-ban meg\u00e9p\u00fclt a kifejezetten a SETI-kutat\u00e1sokra tervezett Big Ear (\u00d3ri\u00e1s F\u00fcl) r\u00e1di\u00f3t\u00e1vcs\u0151, mellyel 1998-ig hallgat\u00f3ztak a vil\u00e1g\u0171rbe, v\u00e1rva az \u201e\u00e9gi jelre\u201d \u2013 val\u00f3s \u00e9s \u00e9rt\u00e9kelhet\u0151 eredm\u00e9ny n\u00e9lk\u00fcl, \u00edgy azt\u00e1n a hatalmas m\u0171szert elbontott\u00e1k, s a hely\u00e9n golfp\u00e1ly\u00e1t l\u00e9tes\u00edtettek.
\nA Fermi-paradoxon alapja egy\u00e9bk\u00e9nt \u201ea m\u00e9retek \u00e9rve\u201d, amely szerint a Tej\u00fatrendszerben tal\u00e1lhat\u00f3 csillagok becs\u00fclt sz\u00e1ma 250 milli\u00e1rd \u00e9s ez a sz\u00e1m 70 trilli\u00e1rd a vil\u00e1gegyetem l\u00e1that\u00f3 r\u00e9sz\u00e9re vet\u00edtve. M\u00e9g ha elhanyagolhat\u00f3 is lenne az intelligens \u00e9let jelenl\u00e9t\u00e9nek ar\u00e1nya az e csillagok k\u00f6r\u00fcl kering\u0151 bolyg\u00f3kon, akkor is nagysz\u00e1m\u00fa civiliz\u00e1ci\u00f3nak kellene l\u00e9teznie ak\u00e1r a Tej\u00fatrendszeren bel\u00fcl is. Az \u00e1ll\u00edt\u00e1s felt\u00e9telezi, hogy a F\u00f6ld nem k\u00fcl\u00f6nleges, csup\u00e1n egy bolyg\u00f3 a sok k\u00f6z\u00fcl, amelyre ugyanazok a szab\u00e1lyok, hat\u00e1sok vonatkoznak, mint b\u00e1rmelyik m\u00e1sik vil\u00e1gra.
\nJ\u00f3, de akkor hol vannak? \u2013 hangoztatj\u00e1k makacsul a k\u00e9tked\u0151k. A k\u00e9rd\u00e9ssel kapcsolatban m\u00e9g tud\u00f3si k\u00f6r\u00f6kben is minimum h\u00e1rom f\u00e9le n\u00e9zet l\u00e9tezik: akik kategorikusan tagadj\u00e1k, hogy l\u00e9tezne F\u00f6ld\u00f6n k\u00edv\u00fcli civiliz\u00e1ci\u00f3, akik azt mondj\u00e1k, hogy ilyeneknek l\u00e9tezni\u00fck kell, \u00e9s akik szerint az idegenek m\u00e1r most is k\u00f6zt\u00fcnk vannak, csak nem fedik f\u00f6l magukat.<\/p>","protected":false},"excerpt":{"rendered":"
Enrico Fermi fizikus m\u00e1sok mellett Teller Ed\u00e9vel eb\u00e9delt, amikor f\u00f6ltette a h\u00edress\u00e9 v\u00e1lt k\u00e9rd\u00e9st: \u201eDe, akkor hol vannak?\u201d M\u00e1rmint a F\u00f6ld\u00f6n k\u00edv\u00fcli civiliz\u00e1ci\u00f3k. Hiszen az Univerzum \u00e9letkora \u00e9s hatalmas sz\u00e1m\u00fa csillaga azt felt\u00e9telezi, hogy a f\u00f6ld\u00f6n k\u00edv\u00fcli \u00e9let \u00e1ltal\u00e1nosan elterjedt kell, hogy legyen.<\/p>","protected":false},"author":8,"featured_media":0,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_robots_primary_cat":"","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"cikk_cimkek":[5],"content_flags":[350],"content_icons":[],"class_list":["post-919","post","type-post","status-publish","format-standard","hentry","category-erdmost","cikk_cimkek-kultura","content_flags-erdekes"],"acf":[],"_links":{"self":[{"href":"https:\/\/erdmost.hu\/en\/wp-json\/wp\/v2\/posts\/919","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/erdmost.hu\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/erdmost.hu\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/erdmost.hu\/en\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/erdmost.hu\/en\/wp-json\/wp\/v2\/comments?post=919"}],"version-history":[{"count":0,"href":"https:\/\/erdmost.hu\/en\/wp-json\/wp\/v2\/posts\/919\/revisions"}],"wp:attachment":[{"href":"https:\/\/erdmost.hu\/en\/wp-json\/wp\/v2\/media?parent=919"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/erdmost.hu\/en\/wp-json\/wp\/v2\/categories?post=919"},{"taxonomy":"cikk_cimkek","embeddable":true,"href":"https:\/\/erdmost.hu\/en\/wp-json\/wp\/v2\/cikk_cimkek?post=919"},{"taxonomy":"content_flags","embeddable":true,"href":"https:\/\/erdmost.hu\/en\/wp-json\/wp\/v2\/content_flags?post=919"},{"taxonomy":"content_icons","embeddable":true,"href":"https:\/\/erdmost.hu\/en\/wp-json\/wp\/v2\/content_icons?post=919"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}