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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 Caelum ： ウィキペディア英語版 Caelum Caelum is a faint constellation in the southern sky, introduced in the 1750s by Nicolas Louis de Lacaille. Its name means "chisel" in Latin, and it was formerly known as Caelum Scalptorium ("the engravers' chisel"); a rare word, unconnected with the far more common Latin ''caelum'', meaning "sky, heaven, atmosphere".〔Charlton T. Lewis, Ph.D. and. Charles Short, ''A Latin Dictionary'' Oxford University Press, 1879. Entries for ''caelum'' and ''caelum''.〕 It is the eighth-smallest constellation, and subtends a solid angle of around 0.038 steradians, just less than that of Corona Australis. Due to its small size and location away from the plane of the Milky Way, Caelum is a rather barren constellation, with few objects of interest. The constellation's brightest star, Alpha Caeli, is only of magnitude 4.45, and only one other star (Gamma1 Caeli) is brighter than magnitude 5. Other notable objects in Caelum are RR Caeli,a binary star with one known planet approximately away; X Caeli, a Delta Scuti variable that forms an optical double with Gamma1 Caeli; and HE0450-2958, a Seyfert galaxy that at first appeared as just a jet with no host galaxy visible. == History == Caelum was first introduced in the eighteenth century by Nicolas Louis de Lacaille, a French astronomer who introduced thirteen other southern constellations at the same time. The French name Lacaille gave the constellation, ''Burin'', was originally Latinized to ''Caelum Scalptorium'' ("The Engravers' Chisel"), and Francis Baily shortened this name to ''Caelum'' after a suggestion by John Herschel. In Lacaille's original chart, the constellation was shown both as a burin and an échoppe, although it has come to be recognized simply as a chisel.〔 Johann Elert Bode stated the name as plural with a singular possessor, ''Caela Scalptoris'' ("the Engraver's Chisels") but this did not stick.〔 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「Caelum」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.