{"id":42266,"date":"2016-01-07T22:37:31","date_gmt":"2016-01-07T20:37:31","guid":{"rendered":"http:\/\/www.lovendal.ro\/wp52\/?p=42266"},"modified":"2016-01-07T22:37:36","modified_gmt":"2016-01-07T20:37:36","slug":"o-lumina-puternica-neobisnuita-a-fost-observata-de-astronomi-la-o-distanta-de-8-000-de-ani-lumina-in-galaxia-noastra-specialistii-spun-ca-e-vorba-de-o-gaura-neagra-dar-daca-e-o-manifestare-a-unei-s","status":"publish","type":"post","link":"https:\/\/www.lovendal.ro\/wp52\/o-lumina-puternica-neobisnuita-a-fost-observata-de-astronomi-la-o-distanta-de-8-000-de-ani-lumina-in-galaxia-noastra-specialistii-spun-ca-e-vorba-de-o-gaura-neagra-dar-daca-e-o-manifestare-a-unei-s\/","title":{"rendered":"O lumin\u0103 puternic\u0103, neobi\u015fnuit\u0103 a fost observat\u0103 de astronomi la o distan\u0163\u0103 de 8.000 de ani-lumin\u0103 \u00een galaxia noastr\u0103! Speciali\u015ftii spun c\u0103 e vorba de o gaur\u0103 neagr\u0103, dar dac\u0103 e o manifestare a unei superciviliza\u0163ii extraterestre?"},"content":{"rendered":"<p><a href=\"https:\/\/www.lovendal.ro\/wp52\/o-lumina-puternica-neobisnuita-a-fost-observata-de-astronomi-la-o-distanta-de-8-000-de-ani-lumina-in-galaxia-noastra-specialistii-spun-ca-e-vorba-de-o-gaura-neagra-dar-daca-e-o-manifestare-a-unei-s\/lumina-gaura-neagra\/\" rel=\"attachment wp-att-42267\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-full wp-image-42267\" src=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2016\/01\/lumina-gaura-neagra.jpg\" alt=\"lumina gaura neagra\" width=\"335\" height=\"223\" srcset=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2016\/01\/lumina-gaura-neagra.jpg 335w, https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2016\/01\/lumina-gaura-neagra-300x200.jpg 300w\" sizes=\"auto, (max-width: 335px) 100vw, 335px\" \/><\/a>Astronomii au descoperit c\u0103 g\u0103urile negre pot fi observate printr-un telescop optic simplu, atunci c\u00e2nd materialul din spa\u0163iul \u00eenconjur\u0103tor se pr\u0103bu\u015fe\u015fte \u00een ele, eliber\u00e2nd explozii violente de lumin\u0103. Aparenta contradic\u021bie apare atunci c\u00e2nd gravita\u021bia unei g\u0103uri negre atrage materia din stelele din apropiere, produc\u00e2nd o lumin\u0103 care poate fi vizualizat\u0103 dintr-un telescop modest de 20 cm.<\/p>\n<p>Cercet\u0103torii japonezi au detectat undele luminoase de la V404 Cygni &#8211; o gaur\u0103 neagr\u0103 activ\u0103 \u00een constela\u021bia Cygnus a, atunci c\u00e2nd aceasta s-a trezit dintr-un somn lung de 26 de ani, \u00een iunie 2015. Mariko Kimura de la Universitatea Kyoto a ar\u0103tat cum telescoapele au reperat flash-uri de lumin\u0103 care vin de la gaur\u0103 neagr\u0103 ce a r\u0103mas activ\u0103 peste dou\u0103 s\u0103pt\u0103m\u00e2ni. Flash-urile de lumin\u0103 au durat de la c\u00e2teva minute p\u00e2n\u0103 la c\u00e2teva ore. Unele dintre telescoape au fost la \u00eendem\u00e2na astronomilor amatori, cu lentile mici de 20 cm. <em>&#8222;Acum \u015ftim c\u0103 putem face observa\u021bii bazate pe lumina vizibil\u0103; cu alte cuvinte \u0219i g\u0103urile negre pot fi observate f\u0103r\u0103 telescoape de raze gamma sau raze X&#8221;<\/em>, a spus Kimura.<\/p>\n<p>Gaura neagr\u0103, una dintre cele mai aproape de P\u0103m\u00e2nt, are o stea-companion ceva mai mic\u0103 dec\u00e2t Soarele. Cele dou\u0103 obiecte orbiteaz\u0103 reciproc la fiecare \u0219ase zile \u0219i jum\u0103tate, la aproximativ 8.000 de ani-lumin\u0103 de P\u0103m\u00e2nt. G\u0103urile negre, care au stele \u00een apropiere, pot &#8222;reveni la via\u021b\u0103&#8221; o dat\u0103 la c\u00e2teva decenii. \u00cen cazul lui V404 Cygni, atrac\u021bia gravita\u021bional\u0103 exercitat\u0103 asupra stelei sale companion a fost at\u00e2t de puternic\u0103, \u00eenc\u00e2t steaua a fost deposedat\u0103 de materia sa de la suprafa\u021b\u0103. Aceasta a fost atras\u0103 sub form\u0103 de spiral\u0103 \u00een jos, \u00een gaura neagr\u0103, eliber\u00e2nd o explozie de radia\u021bii. P\u00e2n\u0103 \u00een prezent, izbucnirile similare au fost observate doar ca flash-uri intense de raze X \u0219i raze gamma.<\/p>\n<p>Evenimentul a avut loc \u00een iunie 2015. Poshak Gandhi, astronom la Universitatea din Southampton, a declarat c\u0103 gaura neagr\u0103 a fost extrem de luminoas\u0103 atunci c\u00e2nd materia stelar\u0103 s-a pr\u0103bu\u015fit \u00een ea, \u00een ciuda faptului c\u0103 ea este \u00eenv\u0103luit\u0103 de gaze interstelare \u0219i praf. <em>&#8222;\u00cen lipsa prafului \u015fi gazelor, V404 Cygni ar fi fost unul dintre obiectele cele mai \u00eendep\u0103rtate din Calea Lactee vizibile pe cer cu ochiul liber \u00een iunie 2015&#8221;<\/em>, a declarat specialistul.<\/p>\n<p><em><strong>Sursa:<\/strong><\/em> <strong><a href=\"http:\/\/www.theguardian.com\/science\/2016\/jan\/06\/visible-light-black-holes-detected-for-first-time-v404-cygni\" target=\"_blank\">The Guardian<\/a><\/strong><\/p>\n<p>P.S. Oare e vorba de o gaur\u0103 neagr\u0103 acolo, la 8.000 de ani-lumin\u0103, sau poate fi o activitate a unei superciviliza\u0163ii extraterestre, manifestat\u0103 prin lumini puternice?<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Astronomii au descoperit c\u0103 g\u0103urile negre pot fi observate printr-un telescop optic simplu, atunci c\u00e2nd materialul din spa\u0163iul \u00eenconjur\u0103tor se pr\u0103bu\u015fe\u015fte \u00een ele, eliber\u00e2nd explozii violente de lumin\u0103. Aparenta contradic\u021bie apare atunci c\u00e2nd gravita\u021bia unei g\u0103uri negre atrage materia din &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"O lumin\u0103 puternic\u0103, neobi\u015fnuit\u0103 a fost observat\u0103 de astronomi la o distan\u0163\u0103 de 8.000 de ani-lumin\u0103 \u00een galaxia noastr\u0103! Speciali\u015ftii spun c\u0103 e vorba de o gaur\u0103 neagr\u0103, dar dac\u0103 e o manifestare a unei superciviliza\u0163ii extraterestre?\" class=\"read-more button\" href=\"https:\/\/www.lovendal.ro\/wp52\/o-lumina-puternica-neobisnuita-a-fost-observata-de-astronomi-la-o-distanta-de-8-000-de-ani-lumina-in-galaxia-noastra-specialistii-spun-ca-e-vorba-de-o-gaura-neagra-dar-daca-e-o-manifestare-a-unei-s\/#more-42266\" aria-label=\"Cite\u0219te mai multe despre O lumin\u0103 puternic\u0103, neobi\u015fnuit\u0103 a fost observat\u0103 de astronomi la o distan\u0163\u0103 de 8.000 de ani-lumin\u0103 \u00een galaxia noastr\u0103! Speciali\u015ftii spun c\u0103 e vorba de o gaur\u0103 neagr\u0103, dar dac\u0103 e o manifestare a unei superciviliza\u0163ii extraterestre?\">Cititi mai multe<\/a><\/p>\n","protected":false},"author":1,"featured_media":42267,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2833,106],"tags":[102,1405,433,596,1367,952,105,6987,3204,2467,3348,865,733,9803,434,2250],"class_list":["post-42266","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-noutati","category-stiinta","tag-astronomie","tag-calea-lactee","tag-galaxie","tag-gaura-neagra","tag-gravitatie","tag-lumina","tag-pamant","tag-praf","tag-radiatii","tag-raze-gamma","tag-raze-x","tag-soare","tag-stea","tag-stiinta","tag-telescop","tag-universitate","resize-featured-image"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v23.3 (Yoast SEO v24.2) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>O lumin\u0103 puternic\u0103, neobi\u015fnuit\u0103 a fost observat\u0103 de astronomi la o distan\u0163\u0103 de 8.000 de ani-lumin\u0103 \u00een galaxia noastr\u0103! Speciali\u015ftii spun c\u0103 e vorba de o gaur\u0103 neagr\u0103, dar dac\u0103 e o manifestare a unei superciviliza\u0163ii extraterestre? - Secretele lui Lovendal<\/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.lovendal.ro\/wp52\/o-lumina-puternica-neobisnuita-a-fost-observata-de-astronomi-la-o-distanta-de-8-000-de-ani-lumina-in-galaxia-noastra-specialistii-spun-ca-e-vorba-de-o-gaura-neagra-dar-daca-e-o-manifestare-a-unei-s\/\" \/>\n<meta property=\"og:locale\" content=\"ro_RO\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"O lumin\u0103 puternic\u0103, neobi\u015fnuit\u0103 a fost observat\u0103 de astronomi la o distan\u0163\u0103 de 8.000 de ani-lumin\u0103 \u00een galaxia noastr\u0103! 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