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NGC 4945
NGC 4945 is a spiral galaxy in the constellation Centaurus, and near the bright star, Zeta Centauri.〔http://www.docdb.net/show_object.php?id=ngc_4945, NGC 4945 : DOCdb :Deep Sky Observer's Companion – the online database〕 The galaxy was discovered by James Dunlop in 1826. It is thought to be similar to the Milky Way Galaxy, although X-ray observations show that NGC 4945 has an unusual energetic Seyfert 2 nucleus that might house a large black hole.〔(【引用サイトリンク】url=http://www.sciencedaily.com/releases/2009/09/090902112111.htm )〕 ==Galaxy group==
NGC 4945 one of the brightest galaxies of the Centaurus A/M83 Group, a large, nearby group of galaxies. The galaxy is the second brightest galaxy in the subgroup centered on Centaurus A.
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「NGC 4945」の詳細全文を読む
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