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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 Semeykin (crater) ： ウィキペディア英語版 Semeykin (crater) Semeykin Crater is a crater in the Ismenius Lacus quadrangle on Mars. It is located at 41.8° north latitude and 351.4° west longitude. Semeykin Crater is 76.0 km in diameter and was named after Boris Semeykin, a Soviet astronomer (1900-1937). Wikilyotmola.jpg|MOLA map showing Semeykin Crater and other nearby craters. Colors indicate elevations. Wikisemeykin.jpg|Semeykin Crater, as seen by CTX camera on(Mars Reconnaissance Orbiter). ==Why are Craters important?== The density of impact craters is used to determine the surface ages of Mars and other solar system bodies.〔http://www.lpi.usra.edu/publications/slidesets/stones/〕 The older the surface, the more craters present. Crater shapes can reveal the presence of ground ice. 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「Semeykin (crater)」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.