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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 Gregorian telescope ： ウィキペディア英語版 Gregorian telescope The Gregorian telescope is a type of reflecting telescope designed by Scottish mathematician and astronomer James Gregory in the 17th century, and first built in 1673 by Robert Hooke. The design pre-dates the first practical reflecting telescope, the Newtonian telescope, built by Sir Isaac Newton in 1668,〔(Isaac Newton: adventurer in thought, by Alfred Rupert Hall, page 67 )〕 but was not successfully built until five years after Newton's first reflecting telescope. ==History== The Gregorian telescope is named after the James Gregory design which appeared in his 1663 publication ''Optica Promota'' (The Advance of Optics). Similar theoretical designs have been found in the writings of Bonaventura Cavalieri (''Lo Specchio Ustorio'' (On Burning Mirrors), 1632〔Stargazer, the Life and Times of the Telescope, by Fred Watson, (p. 134 )〕) and Marin Mersenne (''L'harmonie universalle'', 1636〔Stargazer, (p. 115 ).〕). Gregory's early attempts to build the telescope failed, since he had no practical skill himself and he could find no optician capable of actually constructing one.〔(A Biographical Dictionary of Eminent Scotsmen By Robert Chambers, Thomas – Page 175 )〕 It was not until ten years after Gregory's publication, aided by the interest of experimental scientist Robert Hooke, that a working instrument was created. The early Scottish optician and telescope maker James Short built Gregorian telescopes with parabolic mirrors made from the highly reflective speculum metal. 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「Gregorian telescope」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.