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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 Eskimo Nebula ： ウィキペディア英語版 Eskimo Nebula The Eskimo Nebula (NGC 2392), also known as the Clownface Nebula〔(Windows to the Universe )〕 or Caldwell 39, is a bipolar〔 double-shell planetary nebula (PN). It was discovered by astronomer William Herschel in 1787. The formation resembles a person's head surrounded by a parka hood. It is surrounded by gas that composed the outer layers of a Sun-like star. The visible inner filaments are ejected by a strong wind of particles from the central star. The outer disk contains unusual light-year-long filaments. NGC 2392 lies more than 2,870 light-years away and is visible with a small telescope (but more preferably with a larger telescope) in the constellation of Gemini. ==Historic data== The nebula was discovered by William Herschel on January 17, 1787, in Slough, England. He described it as "A star 9th magnitude with a pretty bright middle, nebulosity equally dispersed all around. A very remarkable phenomenon."〔''The Scientific Papers of Sir William Herschel'' by J. L. E. Dreyer, Royal Society, London 1912〕 NGC 2392 WH IV-45 is included in the Astronomical League's Herschel 400 observing program. 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「Eskimo Nebula」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.