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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 Barn door tracker ： ウィキペディア英語版 Barn door tracker A barn door tracker, also known as a Haig or Scotch mount, is a device used to cancel out the diurnal motion of the Earth for the observation or photography of astronomical objects. It is a simple alternative to attaching a camera to a motorized equatorial mount. ==History== The barn door tracker was created by George Haig. His plans were first published in ''Sky & Telescope'' magazine in April 1975. Modified versions of the tracker were published in the magazine's February 1988 and June 2007 editions. In late 2002 and early 2003, NASA astronaut Don Pettit, part of International Space Station Expedition 6, constructed a barn door tracker using spare parts he had accumulated from around the space station, permitting sharper high resolution images of city lights at night from the ISS. 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「Barn door tracker」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.