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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 MAXI J1659-152 ： ウィキペディア英語版 MAXI J1659-152 MAXI J1659-152 is a rapidly rotating black-hole/star system, discovered by NASA’s Swift space telescope on September 25, 2010. On March 19, 2013, ESA’s XMM-Newton space telescope has helped to identify a star and a black hole that orbit each other at the rate of once every 2.4 hours. The black hole and the star orbit their common center of mass. Because the star is the lighter object, it lies farther from this point and has to travel around its larger orbit at a breakneck speed of two million kilometers per hour, which is 555 kilometers per second. The star is the fastest moving star ever seen in an X-ray binary system. On the other hand, the black hole orbits at ‘only’ 150 000 km/h. The black hole in this compact pairing is at least three times more massive than the Sun, while its red dwarf companion star has a mass only 20% that of the Sun. The pair is separated by roughly a million kilometers - for comparison the distance to the Sun from Earth is about 150 million kilometers.〔(MAXI J1659-152: The shortest orbital period black-hole transient in outburst (2012) )〕 ==See also== *MAXI (ISS Experiment) 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「MAXI J1659-152」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.