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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 Messier 109 ： ウィキペディア英語版 Messier 109 Messier 109 (also known as ''NGC 3992'') is a barred spiral galaxy approximately 〔It is also by far the most distant object in the Messier Catalog, followed by M91 (【引用サイトリンク】work=NASA/IPAC Extragalactic Database )〕 away in the constellation Ursa Major. M109 can be seen southeast of the star Phecda (γ UMa). ==History== Messier 109 was discovered by Pierre Méchain in 1781. In 1783 Charles Messier catalogued NGC 3992 as his 109th object. Between the 1920s through the 1950s, it was considered that Messier objects over 103 were not official, but in later years the additions became more widely accepted. David H. Levy mentions the modern 110 object catalog while Sir Patrick Moore gave the original to 104 but has M105-M109 listed as an addendum. By the late 1970s all 110 objects are commonly used among astronomers as they still are today. 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 109」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.