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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 Shapley 1 ： ウィキペディア英語版 Shapley 1 Shapley 1 (''Sp 1'' or ''PLN 329+2.1'')〔(【引用サイトリンク】 publisher=Astrosurf )〕 is an annular planetary nebula in the constellation of Norma with a magnitude of +12.6. As viewed from Earth, it is peculiar in that it seems to be a non-bipolar, torus-shaped planetary nebula. However, it is thought that this is due to the viewpoint of looking directly down on a binary system whose orbit is perpendicular to Earth. Discovered in 1936 by Harlow Shapley,〔〔 it is approximately 4900 light years from Earth, and is around 8700 years old.〔 At the centre of the nebula is a magnitude 14 white dwarf star. It has an angular diameter of 1.1 arc minutes,〔(【引用サイトリンク】url=http://www.daviddarling.info/encyclopedia/S/Shapley_1.html )〕 which makes it about one-third (.32) of a light year across. ==References== 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「Shapley 1」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.