翻訳と辞書 Words near each other ・ Near-sourcing ・ Neapolitan scale ・ Neapolitan School ・ Neapolitan ship Vesuvio (1824) ・ Neapolitan sums ・ Neapolitan Turk ・ Neapolitan wafer ・ Neapolitan War ・ Neapolitan Way ・ Neapolitani ・ Neapolitans (chocolate) ・ Neapolitans in Milan ・ Neapope ・ Near ・ Near (Death Note) ・ Near 3 kpc Arm ・ Near abroad ・ Near and Far Away ・ Near and far field ・ Near and Far Sawrey ・ Near Caves ・ Near Changes ・ Near Dark ・ Near Dark (soundtrack) ・ Near Dark (unfinished film) ・ Near Death (comics) ・ Near Death Experience (Cro-Mags album) ・ Near Death Experience (disambiguation) ・ Near Death Experience (film) ・ Near Death Experience (Spektr album) 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 Near 3 kpc Arm ： ウィキペディア英語版 Near 3 kpc Arm The Near 3 kpc Arm (also called Expanding 3 kpc Arm or simply 3 kpc Arm) was discovered in the 1950s by astronomer van Woerden and collaborators through 21-centimeter radio measurements of HI (atomic hydrogen).〔(Expansion d'une structure spirale dans le noyau du Système Galactique, et position de la radiosource Sagittarius A ), Comptes Rendus l'Academie des Sciences, Vol. 244, p. 1691–1695, 1957〕〔(A New Spiral Arm of the Galaxy: The Far 3-Kpc Arm ), T. M. Dame, P. Thaddeus, ApJ Letters, 2008〕 It was found to be expanding away from the center of the Milky Way at more than 50 km/s. This spiral arm contains about 10 million solar masses of gas, mostly hydrogen atoms and molecules.〔(Milky Way's Inner Beauty Revealed ), Press Release Harvard-Smithsonian Center for Astrophysics, 2008〕 It is located in the fourth galactic quadrant at a distance of about 5.2 kpc from the Sun and 3.3 kpc from the galactic center.〔 The last attempt to search for star forming regions in the Near 3 kpc Arm (in 1980) showed little star formation occurring in the numerous molecular clouds of this arm.〔(The Far 3kpc Arm ) NASA/Astronomy Picture of the Day, 2008〕〔(Star formation and ionization in the 3 kiloparsec arm ), Astrophysical Journal, Part 1, vol. 241, Oct. 1, 1980, p. 200–207〕 Along with the Far 3 kpc Arm discovered in 2008, these inner arms establish our Galaxy's simple symmetry.〔 ==References== 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「Near 3 kpc Arm」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.