. "5811"^^ . "SDSS J102915+172927 \u00E9 uma estrela pequena (com aproximadamente 80% do tamanho do Sol), muito antiga - tem 13 bilh\u00F5es de anos (quase a idade do Universo) - descoberta no ano de 2011 e que est\u00E1 localizada na constela\u00E7\u00E3o de Le\u00E3o. \u00C9 99,9993% composta de h\u00E9lio e hidrog\u00EAnio. Segundo os cientistas, ela n\u00E3o deveria existir, pois contraria as teorias actuais da forma\u00E7\u00E3o estrelar. Segundo , cientista que liderou a equipe de investigadores quando da descoberta, \"Uma teoria muito aceita prediz que estrelas como esta, com pequena massa e quantidades de metais extremamente baixas, n\u00E3o deveriam existir porque as nuvens de material a partir das quais tais objetos se formariam nunca se poderiam ter condensado\"."@pt . . "SDSS J102915+172927 \u00E9 uma estrela pequena (com aproximadamente 80% do tamanho do Sol), muito antiga - tem 13 bilh\u00F5es de anos (quase a idade do Universo) - descoberta no ano de 2011 e que est\u00E1 localizada na constela\u00E7\u00E3o de Le\u00E3o. \u00C9 99,9993% composta de h\u00E9lio e hidrog\u00EAnio."@pt . . . . "\u2264"@en . . . . . "SDSS J102915+172927"@ru . . . . "SDSS J102915+172927\uFF0C\u6216\u7A31\u70BA\u5361\u798F\u661F\uFF08\u82F1\u8A9E\uFF1ACaffau's star\uFF09\uFF0C\u662F\u4E00\u9846\u4F4D\u65BC\u9280\u6CB3\u7CFB\u6688\u7684\u7B2C\u4E8C\u661F\u65CF\u661F\uFF0C\u5728\u5929\u7403\u4E0A\u4F4D\u65BC\u7345\u5B50\u5EA7\u3002"@zh . . . . . . . "\u2264 0.8"@en . "SDSS J102915+172927, dite l'\u00E9toile de Caffau, est une \u00E9toile qui se trouve \u00E0 environ 4 000 ann\u00E9es-lumi\u00E8re de la Terre dans la constellation du Lion, \u00E2g\u00E9e d'environ 13 milliards d'ann\u00E9es. Elle a \u00E9t\u00E9 d\u00E9couverte par la scientifique Elisabetta Caffau ainsi que ses coll\u00E8gues de l'Observatoire europ\u00E9en austral au Chili."@fr . . . . . . . . "SDSS J102915+172927 (\u0438\u043B\u0438 \u0437\u0432\u0435\u0437\u0434\u0430 \u041A\u0430\u0444\u0444\u0430\u0443) \u2014 \u044D\u0442\u043E \u0437\u0432\u0435\u0437\u0434\u0430 \u0441 \u0443\u043D\u0438\u043A\u0430\u043B\u044C\u043D\u043E \u043C\u0430\u043B\u043E\u0439 \u043C\u0435\u0442\u0430\u043B\u043B\u0438\u0447\u043D\u043E\u0441\u0442\u044C\u044E, \u043D\u0430\u0431\u043B\u044E\u0434\u0430\u0435\u043C\u0430\u044F \u0432 \u0441\u043E\u0437\u0432\u0435\u0437\u0434\u0438\u0438 \u041B\u044C\u0432\u0430. \u041E\u043D\u0430 \u043E\u0442\u043D\u043E\u0441\u0438\u0442\u0441\u044F \u043A \u0437\u0432\u0451\u0437\u0434\u0430\u043C II \u043D\u0430\u0441\u0435\u043B\u0435\u043D\u0438\u044F \u0441 \u0432\u043E\u0437\u0440\u0430\u0441\u0442\u043E\u043C \u0432 13 \u043C\u0438\u043B\u043B\u0438\u0430\u0440\u0434\u043E\u0432 \u043B\u0435\u0442, \u0447\u0442\u043E \u0434\u0435\u043B\u0430\u0435\u0442 \u0435\u0451 \u043E\u0434\u043D\u0438\u043C \u0438\u0437 \u0441\u0430\u043C\u044B\u0445 \u0441\u0442\u0430\u0440\u044B\u0445 \u043E\u0431\u044A\u0435\u043A\u0442\u043E\u0432 \u0432 \u0413\u0430\u043B\u0430\u043A\u0442\u0438\u043A\u0435. \u041D\u0430 \u043C\u043E\u043C\u0435\u043D\u0442 \u043E\u0442\u043A\u0440\u044B\u0442\u0438\u044F \u0437\u0432\u0435\u0437\u0434\u0430 \u0438\u043C\u0435\u043B\u0430 \u0441\u0430\u043C\u0443\u044E \u043C\u0430\u043B\u0443\u044E \u043C\u0435\u0442\u0430\u043B\u043B\u0438\u0447\u043D\u043E\u0441\u0442\u044C \u0438\u0437 \u0432\u0441\u0435\u0445 \u0438\u0437\u0432\u0435\u0441\u0442\u043D\u044B\u0445 \u0437\u0432\u0451\u0437\u0434, \u0447\u0442\u043E \u043F\u0440\u0438 \u0435\u0451 \u043C\u0430\u0441\u0441\u0435 (\u043C\u0435\u043D\u0435\u0435 0,8 \u043C\u0430\u0441\u0441 \u0421\u043E\u043B\u043D\u0446\u0430) \u0438\u0434\u0451\u0442 \u0432\u0440\u0430\u0437\u0440\u0435\u0437 \u0441 \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u044E\u0449\u0438\u043C\u0438 \u0442\u0435\u043E\u0440\u0438\u044F\u043C\u0438 \u043E\u0431\u0440\u0430\u0437\u043E\u0432\u0430\u043D\u0438\u044F \u0437\u0432\u0451\u0437\u0434. \u0418\u043C\u0435\u0435\u0442\u0441\u044F \u0431\u043E\u043B\u044C\u0448\u043E\u0439 \u0434\u0435\u0444\u0438\u0446\u0438\u0442 \u0443\u0433\u043B\u0435\u0440\u043E\u0434\u0430, \u043A\u0438\u0441\u043B\u043E\u0440\u043E\u0434\u0430, \u0430\u0437\u043E\u0442\u0430 \u0438 \u043F\u043E\u0447\u0442\u0438 \u043F\u043E\u043B\u043D\u043E\u0435 \u043E\u0442\u0441\u0443\u0442\u0441\u0442\u0432\u0438\u0435 \u043B\u0438\u0442\u0438\u044F (\u043E\u043D \u0441\u043E\u0432\u0441\u0435\u043C \u043D\u0435 \u0431\u044B\u043B \u043E\u0431\u043D\u0430\u0440\u0443\u0436\u0435\u043D, \u0442\u043E \u0435\u0441\u0442\u044C \u0435\u0433\u043E \u0441\u043E\u0434\u0435\u0440\u0436\u0430\u043D\u0438\u0435 \u043D\u0438\u0436\u0435 \u0447\u0443\u0432\u0441\u0442\u0432\u0438\u0442\u0435\u043B\u044C\u043D\u043E\u0441\u0442\u0438 \u0438\u0437\u043C\u0435\u0440\u0435\u043D\u0438\u0439). \u0421\u043E\u0434\u0435\u0440\u0436\u0430\u043D\u0438\u0435 \u0431\u043E\u043B\u0435\u0435 \u0442\u044F\u0436\u0451\u043B\u044B\u0445, \u0447\u0435\u043C \u0433\u0435\u043B\u0438\u0439, \u044D\u043B\u0435\u043C\u0435\u043D\u0442\u043E\u0432 \u043D\u0430\u0441\u0442\u043E\u043B\u044C\u043A\u043E \u043C\u0430\u043B\u043E, \u0447\u0442\u043E \u043F\u0435\u0440\u0432\u043E\u043D\u0430\u0447\u0430\u043B\u044C\u043D\u043E \u043A\u0440\u043E\u043C\u0435 \u043D\u0435\u0433\u043E \u0438 \u0432\u043E\u0434\u043E\u0440\u043E\u0434\u0430 \u0431\u044B\u043B \u043E\u0431\u043D\u0430\u0440\u0443\u0436\u0435\u043D \u0442\u043E\u043B\u044C\u043A\u043E \u043A\u0430\u043B\u044C\u0446\u0438\u0439. \u041F\u0440\u0438\u0448\u043B\u043E\u0441\u044C \u043F\u0440\u043E\u0432\u043E\u0434\u0438\u0442\u044C \u0434\u043E\u043F\u043E\u043B\u043D\u0438\u0442\u0435\u043B\u044C\u043D\u044B\u0435 \u0438\u0441\u0441\u043B\u0435\u0434\u043E\u0432\u0430\u043D\u0438\u044F \u0441 \u0433\u043E\u0440\u0430\u0437\u0434\u043E \u0431\u043E\u043B\u044C\u0448\u0438\u043C\u0438 \u0432\u0440\u0435\u043C\u0435\u043D"@ru . . . "6097"^^ . "SDSS J102915+172927 or Caffau's Star is a population II star in the galactic halo, seen in the constellation Leo. It is about 13 billion years old, making it one of the oldest stars in the Galaxy. At the time of its discovery, it had the lowest metallicity of any known star. It is small (less than 0.8 solar masses), deficient in carbon, nitrogen, oxygen, and completely devoid of lithium. Because carbon and oxygen provide a fine structure cooling mechanism that is critical in the formation of low-mass stars, the origins of Caffau's Star are somewhat mysterious. It has been suggested, both for theoretical and observational reasons, that the formation of low-mass stars in the interstellar medium requires a critical metallicity somewhere between 1.5\u00D710\u22128 and 1.5\u00D710\u22126. The metallicity of Caffau's Star is less than 6.9\u00D710\u22127. According to Schneider et al., cooling by dust rather than the fine structure lines of CII and OI may have enabled the creation of such low-mass, metal-poor stars in the early universe. The absence of lithium implies past temperatures of at least two million kelvins. Data from Gaia's DR2 released in 2018 confirms that SDSS J102915+172927 is a dwarf star. The star was described by Elisabetta Caffau et al. in an article published by the journal Nature in September 2011. Caffau had been searching for extremely metal-poor stars for the past ten years. It was identified by automated software which analyzed data from the Sloan Digital Sky Survey. This was followed up by observations with the X-shooter and UVES instruments on the Very Large Telescope in Chile. Caffau and her team expect to find between five and fifty similar stars with the telescope in the future."@en . "36770904"^^ . . . . . . . "SDSS J102915+172927 or Caffau's Star is a population II star in the galactic halo, seen in the constellation Leo. It is about 13 billion years old, making it one of the oldest stars in the Galaxy. At the time of its discovery, it had the lowest metallicity of any known star. It is small (less than 0.8 solar masses), deficient in carbon, nitrogen, oxygen, and completely devoid of lithium. Because carbon and oxygen provide a fine structure cooling mechanism that is critical in the formation of low-mass stars, the origins of Caffau's Star are somewhat mysterious. It has been suggested, both for theoretical and observational reasons, that the formation of low-mass stars in the interstellar medium requires a critical metallicity somewhere between 1.5\u00D710\u22128 and 1.5\u00D710\u22126. The metallicity of Caffau"@en . "+16.92"@en . . . "SDSS J102915+172927 (\u0438\u043B\u0438 \u0437\u0432\u0435\u0437\u0434\u0430 \u041A\u0430\u0444\u0444\u0430\u0443) \u2014 \u044D\u0442\u043E \u0437\u0432\u0435\u0437\u0434\u0430 \u0441 \u0443\u043D\u0438\u043A\u0430\u043B\u044C\u043D\u043E \u043C\u0430\u043B\u043E\u0439 \u043C\u0435\u0442\u0430\u043B\u043B\u0438\u0447\u043D\u043E\u0441\u0442\u044C\u044E, \u043D\u0430\u0431\u043B\u044E\u0434\u0430\u0435\u043C\u0430\u044F \u0432 \u0441\u043E\u0437\u0432\u0435\u0437\u0434\u0438\u0438 \u041B\u044C\u0432\u0430. \u041E\u043D\u0430 \u043E\u0442\u043D\u043E\u0441\u0438\u0442\u0441\u044F \u043A \u0437\u0432\u0451\u0437\u0434\u0430\u043C II \u043D\u0430\u0441\u0435\u043B\u0435\u043D\u0438\u044F \u0441 \u0432\u043E\u0437\u0440\u0430\u0441\u0442\u043E\u043C \u0432 13 \u043C\u0438\u043B\u043B\u0438\u0430\u0440\u0434\u043E\u0432 \u043B\u0435\u0442, \u0447\u0442\u043E \u0434\u0435\u043B\u0430\u0435\u0442 \u0435\u0451 \u043E\u0434\u043D\u0438\u043C \u0438\u0437 \u0441\u0430\u043C\u044B\u0445 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\u043E\u0431\u0440\u0430\u0437\u043E\u0432\u0430\u043D\u0438\u044F \u0437\u0432\u0451\u0437\u0434. \u0418\u043C\u0435\u0435\u0442\u0441\u044F \u0431\u043E\u043B\u044C\u0448\u043E\u0439 \u0434\u0435\u0444\u0438\u0446\u0438\u0442 \u0443\u0433\u043B\u0435\u0440\u043E\u0434\u0430, \u043A\u0438\u0441\u043B\u043E\u0440\u043E\u0434\u0430, \u0430\u0437\u043E\u0442\u0430 \u0438 \u043F\u043E\u0447\u0442\u0438 \u043F\u043E\u043B\u043D\u043E\u0435 \u043E\u0442\u0441\u0443\u0442\u0441\u0442\u0432\u0438\u0435 \u043B\u0438\u0442\u0438\u044F (\u043E\u043D \u0441\u043E\u0432\u0441\u0435\u043C \u043D\u0435 \u0431\u044B\u043B \u043E\u0431\u043D\u0430\u0440\u0443\u0436\u0435\u043D, \u0442\u043E \u0435\u0441\u0442\u044C \u0435\u0433\u043E \u0441\u043E\u0434\u0435\u0440\u0436\u0430\u043D\u0438\u0435 \u043D\u0438\u0436\u0435 \u0447\u0443\u0432\u0441\u0442\u0432\u0438\u0442\u0435\u043B\u044C\u043D\u043E\u0441\u0442\u0438 \u0438\u0437\u043C\u0435\u0440\u0435\u043D\u0438\u0439). \u0421\u043E\u0434\u0435\u0440\u0436\u0430\u043D\u0438\u0435 \u0431\u043E\u043B\u0435\u0435 \u0442\u044F\u0436\u0451\u043B\u044B\u0445, \u0447\u0435\u043C \u0433\u0435\u043B\u0438\u0439, \u044D\u043B\u0435\u043C\u0435\u043D\u0442\u043E\u0432 \u043D\u0430\u0441\u0442\u043E\u043B\u044C\u043A\u043E \u043C\u0430\u043B\u043E, \u0447\u0442\u043E \u043F\u0435\u0440\u0432\u043E\u043D\u0430\u0447\u0430\u043B\u044C\u043D\u043E \u043A\u0440\u043E\u043C\u0435 \u043D\u0435\u0433\u043E \u0438 \u0432\u043E\u0434\u043E\u0440\u043E\u0434\u0430 \u0431\u044B\u043B \u043E\u0431\u043D\u0430\u0440\u0443\u0436\u0435\u043D \u0442\u043E\u043B\u044C\u043A\u043E \u043A\u0430\u043B\u044C\u0446\u0438\u0439. \u041F\u0440\u0438\u0448\u043B\u043E\u0441\u044C \u043F\u0440\u043E\u0432\u043E\u0434\u0438\u0442\u044C \u0434\u043E\u043F\u043E\u043B\u043D\u0438\u0442\u0435\u043B\u044C\u043D\u044B\u0435 \u0438\u0441\u0441\u043B\u0435\u0434\u043E\u0432\u0430\u043D\u0438\u044F \u0441 \u0433\u043E\u0440\u0430\u0437\u0434\u043E 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"SDSS J102915+172927"@en . . . . . . . . "SDSS J102915+172927, dite l'\u00E9toile de Caffau, est une \u00E9toile qui se trouve \u00E0 environ 4 000 ann\u00E9es-lumi\u00E8re de la Terre dans la constellation du Lion, \u00E2g\u00E9e d'environ 13 milliards d'ann\u00E9es. Elle a \u00E9t\u00E9 d\u00E9couverte par la scientifique Elisabetta Caffau ainsi que ses coll\u00E8gues de l'Observatoire europ\u00E9en austral au Chili."@fr . . "SDSS J102915+172927"@it . "SDSS J102915+172927\uFF0C\u6216\u7A31\u70BA\u5361\u798F\u661F\uFF08\u82F1\u8A9E\uFF1ACaffau's star\uFF09\uFF0C\u662F\u4E00\u9846\u4F4D\u65BC\u9280\u6CB3\u7CFB\u6688\u7684\u7B2C\u4E8C\u661F\u65CF\u661F\uFF0C\u5728\u5929\u7403\u4E0A\u4F4D\u65BC\u7345\u5B50\u5EA7\u3002"@zh . . . . . . . . "SDSS J102915+172927 \u2013 s\u0142aba gwiazda w gwiazdozbiorze Lwa o niezwykle ma\u0142ej metaliczno\u015Bci. Wed\u0142ug powszechnie akceptowanej teorii formowania si\u0119 i ewolucji gwiazd, takie gwiazdy nie powinny wsp\u00F3\u0142cze\u015Bnie istnie\u0107 \u2013 SDSS J102915+172927 jest by\u0107 mo\u017Ce najstarsz\u0105 odkryt\u0105 do tej pory gwiazd\u0105."@pl . . . . "SDSS J102915+172927 \u00E8 una stella di popolazione II appartenente all'alone galattico visibile nella costellazione del Leone. All'epoca della sua scoperta nel 2011 era la stella a pi\u00F9 bassa metallicit\u00E0 fino ad allora conosciuta. Con una et\u00E0 di circa 13 miliardi di anni \u00E8 inoltre una delle stelle pi\u00F9 vecchie conosciute. La stella fu scoperta da Elisabetta Caffau e colleghi, che ne hanno dato notizia in un articolo pubblicato su Nature nel settembre 2011. La scoperta \u00E8 avvenuta mediante l'utilizzo di un software che analizzava automaticamente i dati della Sloan Digital Sky Survey. Una volta individuata la stella \u00E8 stata osservata mediante lo strumento X-shooter del Very Large Telescope in Cile. La stella ha una massa inferiore a 0,8 M\u2609 ed \u00E8 particolarmente carente di carbonio, azoto e ossigeno, mentre il litio \u00E8 completamente assente, il che implica che la stella ha sviluppato temperature di almeno due milioni di K (circa due milioni di \u00B0C). La massa medio-piccola della stella costituisce un problema per i modelli di formazione stellare. Si ritiene infatti che la formazione di stelle di massa piccola e medio-piccola possa avvenire solo se il mezzo interstellare da cui la stella nasce ha una metallicit\u00E0 minima che si suppone compresa fra Z=1,5\u00D710\u22128 e Z=1,5\u00D710\u22126 (ove Z indica la percentuale di metalli presenti nella stella). La stella di Caffau ha una metallicit\u00E0 inferiore a Z=6,9\u00D710\u22127, che corrisponde a una percentuale di metalli almeno 4,5\u00D710\u22125 volte inferiore a quella del Sole. La presenza di una quantit\u00E0 minima di atomi di carbonio, ossigeno e azoto \u00E8 ritenuta necessaria perch\u00E9 essi assorbano l'energia cinetica del gas che costituisce il mezzo interstellare in modo da permetterne il raffreddamento e il collasso. \u00C8 stato proposto che il raffreddamento del gas da cui la stella si \u00E8 formata sia stato causato dalla presenza di grani di polvere piuttosto che dalla presenza di metalli. In alternativa, la stella potrebbe essersi formata dal collasso di una nube di gas molto massiccia che si \u00E8 frammentata in nubi pi\u00F9 piccole. Nel febbraio 2014 \u00E8 stata annunciata la scoperta di SMSS J031300.36-670839.3, una stella avente una metallicit\u00E0 ancora pi\u00F9 bassa di quella della stella di Caffau."@it . "SDSS J102915+172927"@pl . . "SDSS J102915+172927"@fr . . . . . . . . . . "SDSS J102915+172927 \u00E8 una stella di popolazione II appartenente all'alone galattico visibile nella costellazione del Leone. All'epoca della sua scoperta nel 2011 era la stella a pi\u00F9 bassa metallicit\u00E0 fino ad allora conosciuta. Con una et\u00E0 di circa 13 miliardi di anni \u00E8 inoltre una delle stelle pi\u00F9 vecchie conosciute. La stella ha una massa inferiore a 0,8 M\u2609 ed \u00E8 particolarmente carente di carbonio, azoto e ossigeno, mentre il litio \u00E8 completamente assente, il che implica che la stella ha sviluppato temperature di almeno due milioni di K (circa due milioni di \u00B0C)."@it . . "SDSS J102915+172927"@zh . "1118411010"^^ . . . . . "SDSS J102915+172927 \u2013 s\u0142aba gwiazda w gwiazdozbiorze Lwa o niezwykle ma\u0142ej metaliczno\u015Bci. Wed\u0142ug powszechnie akceptowanej teorii formowania si\u0119 i ewolucji gwiazd, takie gwiazdy nie powinny wsp\u00F3\u0142cze\u015Bnie istnie\u0107 \u2013 SDSS J102915+172927 jest by\u0107 mo\u017Ce najstarsz\u0105 odkryt\u0105 do tej pory gwiazd\u0105."@pl . . . . . . . . . . "SDSS J102915+172927"@en . . . "SDSS J102915+172927"@pt .