翻訳と辞書 Words near each other ・ Tauber (surname) ・ Tauber Bridge, Rothenburg ob der Tauber ・ Tauber Valley Railway ・ Tauberbischofsheim ・ Tauberbischofsheim altarpiece ・ Tauberrettersheim ・ Taubert ・ Taubertalradweg ・ Taubes ・ Taubes's Gromov invariant ・ Taubie Kushlick ・ Taubman ・ Tau Aurigae ・ Tau Beta Pi ・ Tau Beta Sigma ・ Tau Boötis ・ Tau Boötis b ・ Tau Cancri ・ Tau Canis Majoris ・ Tau Capricorni ・ Tau Cassiopeiae ・ Tau Centauri ・ Tau Ceti ・ Tau Ceti (video game) ・ Tau Ceti e ・ Tau Ceti f ・ Tau Ceti in fiction ・ Tau conjecture ・ Tau Coronae Borealis ・ Tau Cross 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 Tau Boötis ： ウィキペディア英語版 Tau Boötis Tau Boötis (τ Boo, τ Boötis) is an F-type main-sequence star approximately 51 light-years away〔 in the constellation of Boötes. The system is also a binary star system, with the secondary star being a red dwarf. As of 1999, an extrasolar planet has been confirmed to be orbiting the primary star. == Stellar components == The system is a binary. The primary component is a yellow-white dwarf (spectral type F7 V) and secondary is a dim red dwarf (spectral type M2 V). The system is relatively nearby, distance being about 51 light years. The primary star should be easily visible to the unaided eye under dark skies. The primary star, Tau Boötis A is a yellow-white dwarf. It is 20% more massive than our Sun and thus is somewhat brighter and hotter. It has a radius 1.9 times solar, and is probably about 1.3 billion years old. Since it is more massive than the Sun, its lifespan is shorter - less than 6 billion years. Tau Bootis is the first star apart from the sun to be observed changing the polarity of its magnetic field.〔 It is also listed as a suspected variable star. Tau Boötis B (with a capital B, as opposed to the planet) is a dim red dwarf orbiting the primary star at a distance of 240 AU. One orbit around the primary would take thousands of years to complete. 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「Tau Boötis」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.