{"id":83724,"date":"2022-12-13T19:43:28","date_gmt":"2022-12-13T17:43:28","guid":{"rendered":"https:\/\/www.lovendal.ro\/wp52\/?p=83724"},"modified":"2022-12-13T19:43:28","modified_gmt":"2022-12-13T17:43:28","slug":"astronomii-au-ramas-surprinsi-de-ceea-ce-au-descoperit-in-nebuloasa-inelului-sudic","status":"publish","type":"post","link":"https:\/\/www.lovendal.ro\/wp52\/astronomii-au-ramas-surprinsi-de-ceea-ce-au-descoperit-in-nebuloasa-inelului-sudic\/","title":{"rendered":"Astronomii au r\u0103mas surprin\u015fi de ceea ce au descoperit \u00een Nebuloasa Inelului Sudic"},"content":{"rendered":"<p><a href=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2022\/12\/nebuloasa-inelului-sudic-coperta.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-full wp-image-83725\" src=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2022\/12\/nebuloasa-inelului-sudic-coperta.jpg\" alt=\"\" width=\"358\" height=\"294\" srcset=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2022\/12\/nebuloasa-inelului-sudic-coperta.jpg 358w, https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2022\/12\/nebuloasa-inelului-sudic-coperta-300x246.jpg 300w\" sizes=\"auto, (max-width: 358px) 100vw, 358px\" \/><\/a>Studiind imaginile de la noul telescop spa\u021bial James Webb Space Telescope (JWST), o echip\u0103 interna\u021bional\u0103 de astronomi a g\u0103sit stele necunoscute anterior \u00een norul de gaz str\u0103lucitor \u0219i plasm\u0103, cunoscut sub numele de &#8222;Nebuloasa Inelului Sudic&#8221;, aici g\u0103sindu-se cel pu\u0163in 4 stele.<\/p>\n<p>Prezen\u021ba acestor stele explic\u0103 structurile care \u00eenc\u0103 se formeaz\u0103 pe m\u0103sur\u0103 ce nebuloasa se extinde, produsul mor\u021bii violente a unei singure stele aflat\u0103 \u00een centrul nebuloasei.<\/p>\n<p><em>&#8222;Am fost surprin\u0219i s\u0103 g\u0103sim dovezi a dou\u0103 sau trei stele \u00eenso\u021bitoare care probabil i-au gr\u0103bit moartea, precum \u0219i \u00eenc\u0103 o stea &#8222;spectatoare nevinovat\u0103&#8221; care a fost prins\u0103 \u00een interac\u021biune\u201d<\/em>, explic\u0103 astrofizicianul Orsola De Marco de la Universitatea Macquarie din Australia, cel care a condus cercetarea.<\/p>\n<p>Nebuloasele planetare precum Nebuloasa Inelului Sudic se formeaz\u0103 prin moartea unei stele precum Soarele nostru. C\u00e2nd steaua \u00eencepe s\u0103 r\u0103m\u00e2n\u0103 f\u0103r\u0103 combustibilul necesar fuziunii nucleare \u00een miezul s\u0103u, se face de sute de ori mai mare, extinz\u00e2ndu-se spre exterior \u00eentr-o gigant\u0103 ro\u0219ie.<\/p>\n<p>\u00cen cele din urm\u0103, combustibilul este epuizat, iar materialul exterior al stelei este aruncat \u00een spa\u021biu, \u00een timp ce miezul se pr\u0103bu\u0219e\u0219te \u00eentr-o pitic\u0103 alb\u0103. Materialul ejectat continu\u0103 s\u0103 se extind\u0103 spre exterior \u0219i, ionizat de radia\u021bia de la pitica alb\u0103 (care va continua s\u0103 str\u0103luceasc\u0103), va str\u0103luci fluorescent. Aceasta este nebuloasa planetar\u0103, numit\u0103 a\u0219a pentru c\u0103 aceasta tinde s\u0103 fie destul de sferic\u0103, fiind asem\u0103n\u0103toare cu o planet\u0103. Dar, dac\u0103 mai exist\u0103 ceva \u00een apropierea stelei \u2013 \u0219i exist\u0103 adesea, deoarece stelele sunt legate gravita\u021bional \u00eentre ele \u2013 se pot forma structuri magnifice \u00een nebuloas\u0103.<\/p>\n<p>Nebuloasa Inelului Sudic, numit\u0103 oficial NGC 3132 \u0219i situat\u0103 la aproximativ 2.460 de ani-lumin\u0103 distan\u021b\u0103 fa\u0163\u0103 de noi, este locul mor\u021bii al unei stele care a fost estimat\u0103 de trei ori masa Soarelui nostru. Acum, acea stea este o pitic\u0103 alb\u0103 mic\u0103 \u0219i dens\u0103, \u00een jur de jum\u0103tate din masa Soarelui, \u00eempachetat\u0103 \u00eentr-o sfer\u0103 de dimensiunea P\u0103m\u00e2ntului. Este, de asemenea, \u00eenconjurat\u0103 de un nor de praf rece care o face dificil de v\u0103zut.<\/p>\n<p>Camera NIRCam de la JWST a surprins detalii care apar \u00een nebuloas\u0103 doar \u00een lumina \u00een infraro\u0219u \u015fi nu \u00een cea vizibil\u0103. Astfel, se pare c\u0103 exist\u0103 o a doua stea aproape de centrul nebuloasei. De asemenea, exist\u0103 \u015fi o stea-companion al piticii albe.<\/p>\n<p><a href=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2022\/12\/nebuloasa-inelului-sudic.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-83726\" src=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2022\/12\/nebuloasa-inelului-sudic.jpg\" alt=\"\" width=\"538\" height=\"501\" srcset=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2022\/12\/nebuloasa-inelului-sudic.jpg 538w, https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2022\/12\/nebuloasa-inelului-sudic-300x279.jpg 300w\" sizes=\"auto, (max-width: 538px) 100vw, 538px\" \/><\/a><\/p>\n<p>Structurile \u00een spiral\u0103 care creeaz\u0103 arcade \u00een jurul centrului nebuloasei sunt produsul dansului orbital al acestor dou\u0103 stele &#8211; pitica alb\u0103 moart\u0103 \u0219i companionul viu.<\/p>\n<p>Noile imagini au permis, de asemenea, cercet\u0103torilor s\u0103 efectueze un nou calcul al temperaturii piticei albe, care arde la aproximativ 109.700 grade Celsius.<\/p>\n<p>Nebuloasele planetare sunt fenomene de durat\u0103 relativ scurt\u0103, ar\u0103t\u00e2nd a\u015fa doar aproximativ 10.000 de ani \u00eenainte de a se disipa \u00een spa\u021biul interstelar. Deci, \u00eentr-un fel, suntem foarte noroco\u0219i c\u0103 am prins aceast\u0103 etap\u0103 a ciclului de via\u021b\u0103 al Nebuloasei Inelului Sudic.<\/p>\n<p>Cercetarea a fost publicat\u0103 \u00een revista <strong><em>&#8222;Nature Astronomy&#8221;<\/em><\/strong>.<\/p>\n<p><strong>Sursa<\/strong> (traducerea \u015fi adaptarea proprie): studiul \u015ftiin\u0163ific <strong>&#8222;The messy death of a multiple star system and the resulting planetary nebula as observed by JWST&#8221;<\/strong> \/ <a href=\"https:\/\/www.nature.com\/articles\/s41550-022-01845-2\" target=\"_blank\" rel=\"noopener\"><strong>nature.com<\/strong><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Studiind imaginile de la noul telescop spa\u021bial James Webb Space Telescope (JWST), o echip\u0103 interna\u021bional\u0103 de astronomi a g\u0103sit stele necunoscute anterior \u00een norul de gaz str\u0103lucitor \u0219i plasm\u0103, cunoscut sub numele de &#8222;Nebuloasa Inelului Sudic&#8221;, aici g\u0103sindu-se cel pu\u0163in &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"Astronomii au r\u0103mas surprin\u015fi de ceea ce au descoperit \u00een Nebuloasa Inelului Sudic\" class=\"read-more button\" href=\"https:\/\/www.lovendal.ro\/wp52\/astronomii-au-ramas-surprinsi-de-ceea-ce-au-descoperit-in-nebuloasa-inelului-sudic\/#more-83724\" aria-label=\"Cite\u0219te mai multe despre Astronomii au r\u0103mas surprin\u015fi de ceea ce au descoperit \u00een Nebuloasa Inelului Sudic\">Cititi mai multe<\/a><\/p>\n","protected":false},"author":1,"featured_media":83725,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11039],"tags":[5636,102,139,4471,4570,2359,18008,105,732,6987,2364,865,733,2809,2988,434,17432,2358,2250],"class_list":["post-83724","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-astronomie","tag-astrofizician","tag-astronomie","tag-australia","tag-giganta-rosie","tag-infrarosu","tag-nebuloasa","tag-nebuloasa-inelului-sudic","tag-pamant","tag-planeta","tag-praf","tag-revista","tag-soare","tag-stea","tag-stea-companion","tag-stea-pitica-alba","tag-telescop","tag-telescopul-james-webb","tag-temperatura","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>Astronomii au r\u0103mas surprin\u015fi de ceea ce au descoperit \u00een Nebuloasa Inelului Sudic - 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\/astronomii-au-ramas-surprinsi-de-ceea-ce-au-descoperit-in-nebuloasa-inelului-sudic\/\" \/>\n<meta property=\"og:locale\" content=\"ro_RO\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Astronomii au r\u0103mas surprin\u015fi de ceea ce au descoperit \u00een Nebuloasa Inelului Sudic\" \/>\n<meta property=\"og:description\" content=\"Studiind imaginile de la noul telescop spa\u021bial James Webb Space Telescope (JWST), o echip\u0103 interna\u021bional\u0103 de astronomi a g\u0103sit stele necunoscute anterior \u00een norul de gaz str\u0103lucitor \u0219i plasm\u0103, cunoscut sub numele de &#8222;Nebuloasa Inelului Sudic&#8221;, aici g\u0103sindu-se cel pu\u0163in ... 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