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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 3 Cassiopeiae ： ウィキペディア英語版 3 Cassiopeiae 3 Cassiopeiae (3 Cas) is a hypothetical star in the Cassiopeia constellation catalogued by English astronomer John Flamsteed. It bears no identity with actual stars observed today. Unlike 34 Tauri, which was the planet Uranus, 3 Cas was not reconciled by later knowledge. ==Identity as Cassiopeia A supernova== 3 Cas. was initially thought to be erroneous and indeed in 1875, Baily's catalogue derived from Flamsteed's utterly omits 3 Cas. This was the prevalent opinion until radioastronomy. Cassiopeia A, the brightest radio source in the constellation, is within ten minutes of arc of Flamsteed's position for 3 Cas. Study of Cas. A has shown it to be approximately 300 years old, meaning that Flamsteed may have observed the supernova. Dimmed by intervening dust and gas (the plane of the Milky Way runs through Cassiopeia), the supernova would have appeared at about magnitude six, tying in nicely with Flamsteed's observation of 3 Cas. 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「3 Cassiopeiae」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.