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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Palomar 12 ： ウィキペディア英語版 Palomar 12 Palomar 12 is a globular cluster in the constellation Capricornus that belongs to the halo of the Milky Way Galaxy. First discovered on the National Geographic Society – Palomar Observatory Sky Survey plates by Robert George Harrington and Fritz Zwicky, it was catalogued as a globular cluster. However Zwicky came to believe this was actually a nearby dwarf galaxy in the Local Group. It is a relatively young cluster, being about 30% younger than most of the globular clusters in the Milky Way.〔 It is metal-rich with a metallicity of .〔 It has an average luminosity distribution of . Based on proper motion studies, this cluster was first suspected in 2000 to have been captured from the Sagittarius dwarf galaxy about 1.7 Ga ago. It is now generally believed to be a member of the Sagittarius dwarf galaxy (Cohen 2004, Sbordone et al. 2006).〔 It is estimated to be 6.5 Gyr old.〔 ==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「Palomar 12」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.