翻訳と辞書 Words near each other ・ Nucula ・ Nucula atacellana ・ Nucula certisinus ・ Nucula delphinodonta ・ Nucula dunedinensis ・ Nucula gallinacea ・ Nucula hartvigiana ・ Nucula nitidula ・ Nucleic acid test ・ Nucleic acid thermodynamics ・ Nucleic Acids Research ・ Nucleo Operativo Centrale di Sicurezza ・ Nucleobase ・ Nucleobase cation symporter-1 ・ Nucleobase cation symporter-2 ・ Nucleocosmochronology ・ Nucleocosmogenesis ・ Nucleocytoplasmic large DNA viruses ・ Nucleofection ・ Nucleofuge ・ Nucleogenic ・ Nucleoid ・ Nucleolar phosphoprotein p130 ・ Nucleolar protein, member A1 ・ Nucleolaria granulata ・ Nucleolin ・ Nucleolus ・ Nucleolus organizer region ・ Nucleomorph ・ Nucleon Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Nucleocosmochronology ： ウィキペディア英語版 Nucleocosmochronology Nucleocosmochronology, also known as cosmochronology, is a relatively new technique used to determine timescales for astrophysical objects and events. This technique employs the abundances of heavy radioactive nuclides to calculate the age of formation of astronomical objects in a similar fashion to the dating of rocks in the field of geochronology. Nucleocosmochronology has already been successfully employed to determine the age of the Sun ( billion years) and of the Galactic thin disk (), among others. It has also been used to estimate the age of the Milky Way itself, as exemplified by recent study of Cayrel's Star in the Galactic halo. Limiting factors in its precision are the quality of observations of faint stars, and perhaps more importantly, the uncertainty of the primordial abundances of r-process elements. == See also == * Astrochemistry * Cayrel's Star (CS31082-001) * Metallicity * Nucleosynthesis * Radiometric dating * Stellar evolution *Sun 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Nucleocosmochronology」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.