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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 17 Lyrae ： ウィキペディア英語版 17 Lyrae 17 Lyrae is a binary star system in the constellation Lyra, approximately 132 light years away from Earth. The main star, 17 Lyrae A, is a 5th magnitude white star of the spectral type F0V, meaning it has a surface temperature of about 7,500 kelvins. It is a dwarf star, like our Sun, yet brighter and hotter.〔 Its companion, 17 Lyrae B, is a 9th magnitude star of an unknown spectral type.〔 There was once thought to be a third star in the system, 17 Lyrae C, until it was evident that the star's parallax and proper motions were too different for it to be part of the system. ==See also== * Gliese 747AB 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「17 Lyrae」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.