| 翻訳と辞書 |
Gliese 445
Gliese 445 (Gl 445) is an M-type main sequence star in the constellation of Camelopardalis, close to Polaris. It is currently 17.6 light-years from the Sun and has an apparent magnitude of 10.8.〔 It is visible from north of the Tropic of Cancer all night long, but not to the naked eye.〔Page 168, ''Planets Beyond: Discovering the Outer Solar System'', Mark Littmann, Mineola, New York: Courier Dover Publications, 2004, ISBN 0-486-43602-0.〕 Because the star is a red dwarf with a mass only a quarter to a third of that of our Sun, scientists question the ability of this system to support life.〔 Gliese 445 is also a known X-ray source.
The ''Voyager 1'' probe will pass within 1.6 light years of Gliese 445 in about 40,000 years.〔(NASA – Voyager - Mission - Interstellar Mission )〕 However, by that time the probe will no longer be operational.
== Solar encounter ==
While the Voyager probe flies through space slowly closing on Gliese 445, the star is rapidly approaching the Sun. At the time the probe passes Gliese 445, the star will be about 1.059 parsecs (3.45 light-years) from the Sun, but with less than half the brightness necessary to be seen with the naked eye.〔 But the dwarf star will still be farther away than other stars have achieved.
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「Gliese 445」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.
|
|