翻訳と辞書 Words near each other ・ Epsilon Delphini ・ Epsilon Doradus ・ Epsilon Draconis ・ Epsilon Equulei ・ Epsilon Eridani ・ Epsilon Eridani b ・ Epsilon Eridani in fiction ・ Epsilon Euskadi ee1 ・ Epsilon Geminorum ・ Epsilon Gruis ・ Epsilon Herculis ・ Epsilon Hydrae ・ Epsilon Hydri ・ Epsilon II Archaeological Site ・ Epsilon in Malaysian Pale ・ Epsilon Indi ・ Epsilon Island ・ Epsilon Island (Antarctica) ・ Epsilon Island (Western Australia) ・ Epsilon Island, Bermuda ・ Epsilon Leonis ・ Epsilon Leporis ・ Epsilon Librae ・ Epsilon Lupi ・ Epsilon Lyrae ・ Epsilon Microscopii ・ Epsilon Minus ・ Epsilon Minus (album) ・ Epsilon Monocerotis ・ Epsilon Muscae Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Epsilon Indi ： ウィキペディア英語版 Epsilon Indi Epsilon Indi (ε Indi, ε Ind) is a star system approximately 12 light-years from Earth in the constellation of Indus consisting of a K-type main-sequence star, ε Indi A, and two brown dwarfs, ε Indi Ba and ε Indi Bb, in a wide orbit around it.〔(High-resolution infrared spectroscopy of the brown dwarf ε Indi Ba )〕 The brown dwarfs were discovered in 2003. ε Indi Ba is an early T dwarf (T1) and ε Indi Bb a late T dwarf (T6) separated by 0.6 arcseconds, with a projected distance of 1460 AU from their primary star. ==Observation== The constellation Indus (the Indian) first appeared in Johann Bayer's celestial atlas ''Uranometria'' in 1603. The 1801 star atlas ''Uranographia'', by German astronomer Johann Elert Bode, places Epsilon Indi as one of the arrows being held in the left hand of the Indian. In 1847, Heinrich Louis d'Arrest compared the position of this star in several catalogues dating back to 1750, and discovered that it possessed a measureable proper motion. That is, he found that the star had changed position across the celestial sphere over time. In 1882–3, the parallax of Epsilon Indi was measured by astronomers David Gill and William L. Elkin at the Cape of Good Hope. They derived a parallax estimate of arcseconds. In 1923, Harlow Shapley of the Harvard Observatory derived a parallax of 0.45 arcseconds. During Project Ozma in 1960, this star was examined for artificial radio signals, but none were found. In 1972, the Copernicus satellite was used to examine this star for the emission of ultraviolet laser signals. Again, the result was negative. Epsilon Indi leads a list, compiled by Margaret Turnbull and Jill Tarter of the Carnegie Institution in Washington, of 17,129 nearby stars most likely to have planets that could support complex life. 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「Epsilon Indi」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.