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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 NGC 4254 ： ウィキペディア英語版 Messier 99 Messier 99 (also known as ''M99'' or ''NGC 4254'') is an unbarred spiral galaxy approximately 50 million light-years away〔 (【引用サイトリンク】work=NASA/IPAC Extragalactic Database )〕 in the constellation Coma Berenices. ==History== Messier 99 was discovered by Pierre Méchain on March 17, 1781 along . The discovery was then reported to Charles Messier, who included the object in the Messier Catalogue, which was the first astronomical catalogue of star clusters, nebulae, and galaxies.〔 〕 Messier 99 was one of the first galaxies in which a spiral pattern was first seen. The spiral pattern was first identified by Lord Rosse in the spring of 1846.〔 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「Messier 99」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.