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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 Historical brightest stars ： ウィキペディア英語版 Historical brightest stars The Solar System and all of the visible stars are in different orbits about the core of the Milky Way galaxy. Thus, their relative positions change over time, and for the nearer stars this movement can be measured. As a star moves toward or away from us, its apparent brightness changes. Sirius is currently the brightest star in Earth's night sky, but it has not always been so. Canopus has persistently been the brightest star over the ages; other stars appear brighter only during relatively temporary periods, during which they are passing our solar system at a much closer distance than Canopus. The table below lists the brightest star in Earth's night sky at each period within the last or next 5 million years. 〔 ==References== * - based on computations from HIPPARCOS data. (The calculations exclude stars whose distance or proper motion is uncertain.) 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「Historical brightest stars」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.