{"id":48952,"date":"2019-04-18T09:23:22","date_gmt":"2019-04-18T06:23:22","guid":{"rendered":"http:\/\/realitatearutiera.ro\/?p=48952"},"modified":"2019-04-18T09:23:28","modified_gmt":"2019-04-18T06:23:28","slug":"ce-a-fost-dupa-big-bang-oamenii-de-stiinta-au-descoperit-adevarul","status":"publish","type":"post","link":"https:\/\/realitatearutiera.ro\/?p=48952","title":{"rendered":"Ce a fost dup\u0103 Big Bang? Oamenii de \u0219tiin\u021b\u0103 au descoperit adev\u0103rul"},"content":{"rendered":"\n<p><strong>Oamenii de \u0219tiin\u021b\u0103 au descoperit c\u0103 prima molecul\u0103 format\u0103 dup\u0103 Big Bang a fost HeH+, ionul de hidrur\u0103 de heliu. Studiul a fost realizat de o echip\u0103 de cercet\u0103tori de la Institutul Max Planck pentru Radioastronomie.<\/strong><\/p>\n\n\n\n<p>C\u00e2nd universul s-a format \u00een urma Big Bang-ului, cu 13,8 miliarde de ani \u00een urm\u0103, reac\u021biile chimice care au urmat au contribuit la formarea primelor molecule. Aceste prime molecule au fost esen\u021biale pentru a ajuta la formarea a tot ceea ce \u0219tim.<\/p>\n\n\n\n<p>Cu toate c\u0103 HeH +, ionul de hidrur\u0103 de heliu, a fost considerat ani de zile ca fiind prima molecul\u0103 ap\u0103rut\u0103, oamenii de \u0219tiin\u021b\u0103 nu au g\u0103sit nicio dovad\u0103 a existen\u021bei sale \u00een spa\u021biu, cel pu\u021bin nu p\u00e2n\u0103 acum. Rezultatele au fost publicate, miercuri, \u00een revista Nature, conform\u00a0<a href=\"https:\/\/edition.cnn.com\/2019\/04\/17\/world\/earliest-molecule-in-the-universe-scn\/index.html?no-st=1555563736\">CNN<\/a>.<\/p>\n\n\n\n<p>Dup\u0103 Big Bang, HeH + s-a format \u00eentr-o leg\u0103tur\u0103 molecular\u0103 atunci c\u00e2nd atomii de heliu \u0219i protonii s-au combinat. Mai t\u00e2rziu, acesta s-ar fi descompus \u00een molecule de hidrogen \u0219i atomi de heliu. Ambele elemente sunt dou\u0103 dintre cele mai abundente din univers.<\/p>\n\n\n\n<p>Oamenii de \u0219tiin\u021b\u0103 au reu\u0219it s\u0103 studieze ionul molecular \u00eentr-un laborator \u00een 1925, fapt care a condus la o c\u0103utare lung\u0103 de zeci de ani a HeH + \u00een spa\u021biu.<\/p>\n\n\n\n<p>\u201eChimia Universului a \u00eenceput cu HeH + . Lipsa dovezilor definitive ale existen\u021bei sale \u00een spa\u021biul interstelar a fost o dilem\u0103 pentru astronomie.&#8221;, a declarat Rolf G\u00fcsten, autor \u0219i astronom al Institutului Max Planck pentru Radioastronomie.<\/p>\n\n\n\n<p>Modelele astrochimice de la sf\u00e2r\u0219itul anilor 1970 au indicat o posibilitate de detectare a HeH+. Acest lucru i-a determinat pe oamenii de \u0219tiin\u021b\u0103 s\u0103 cread\u0103 c\u0103 HeH + ar putea exista \u00een spa\u021biu datorit\u0103 emisiei realuzat\u0103 de stele.<\/p>\n\n\n\n<p>Ionul molecular se formeaz\u0103 atunci c\u00e2nd radia\u021bia unei stele atinge temperaturi mai mari de 100.000 de grade. Detectarea acestui tip de molecule s-a realizat cu mare greutate. Opacitatea atmosferei P\u0103m\u00e2ntului exclude utilizarea oric\u0103ror telescoape la sol pentru acest scop.<\/p>\n\n\n\n<p>Astfel, cercet\u0103torii au folosit SOFIA, Observatorul Stratosferic pentru Astronomia Infraro\u0219ie, un dispozitiv Boeing modificat, care transporta un telescop \u0219i care putea zbura deasupra atmosferei inferioare.<\/p>\n\n\n\n<p>Un spectrometru de \u00eenalt\u0103 rezolu\u021bie, GREAT, aflat la bordul SOFIA, a detectat molecula.<\/p>\n\n\n\n<p>\u201eDescoperirea HeH + este o demonstra\u021bie dramatic\u0103 \u0219i frumoas\u0103 a tendin\u021bei naturii de a forma molecule.\u201d, a declarat David Neufeld, co-autor al studiului \u0219i profesor la Departamentul de Fizic\u0103 \u0219i Astronomie de la Universitatea Johns Hopkins.<\/p>\n\n\n\n<p>\u201e\u00cen ciuda ingredientelor nepromi\u0219e care sunt disponibile, un amestec de hidrogen cu heliul de gaz nobil nereactiv \u0219i un mediu dur la mii de grade Celsius se formeaz\u0103 o molecul\u0103 fragil\u0103.&#8221;.<\/p>\n\n\n\n<p>sursa: capital.ro<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Oamenii de \u0219tiin\u021b\u0103 au descoperit c\u0103 prima molecul\u0103 format\u0103 dup\u0103 Big Bang a fost HeH+, ionul de hidrur\u0103 de heliu.<\/p>\n","protected":false},"author":1,"featured_media":48953,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"spay_email":"","footnotes":"","jetpack_publicize_message":""},"categories":[52],"tags":[],"class_list":["post-48952","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-amuzament"],"jetpack_featured_media_url":"https:\/\/i1.wp.com\/realitatearutiera.ro\/wp-content\/uploads\/2019\/04\/big_bang.jpg?fit=1920%2C1080&ssl=1","jetpack_publicize_connections":[],"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p61naM-cJy","jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/realitatearutiera.ro\/index.php?rest_route=\/wp\/v2\/posts\/48952","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/realitatearutiera.ro\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/realitatearutiera.ro\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/realitatearutiera.ro\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/realitatearutiera.ro\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=48952"}],"version-history":[{"count":1,"href":"https:\/\/realitatearutiera.ro\/index.php?rest_route=\/wp\/v2\/posts\/48952\/revisions"}],"predecessor-version":[{"id":48954,"href":"https:\/\/realitatearutiera.ro\/index.php?rest_route=\/wp\/v2\/posts\/48952\/revisions\/48954"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/realitatearutiera.ro\/index.php?rest_route=\/wp\/v2\/media\/48953"}],"wp:attachment":[{"href":"https:\/\/realitatearutiera.ro\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=48952"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/realitatearutiera.ro\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=48952"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/realitatearutiera.ro\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=48952"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}