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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 Virrat (crater) ： ウィキペディア英語版 Virrat (crater) Virrat is a Martian impact crater, approximately 54 kilometres in diameter. It is located at 31.1°S, 103°W, southwest of the crater Dinorwic and northeast of Clantas Fossae. Several Virrat crater radii to the north are the craters Koga and Nhill. It is named after a town in Finland,〔There appears to be no such town as Virrat, Sweden, although there does exist a Virrat, Finland, and it is possible the IAU could have made a mistake when naming the crater.〕 and its name was approved by the International Astronomical Union in 1991.〔(【引用サイトリンク】 work=USGS Gazetteer of Planetary Nomenclature Feature Information )〕〔''NASA World Wind'' 1.4. NASA Ames Research Center, 2007.〕 According to a surface age map of Mars based on US Geological Survey data, the area around Virrat is from the Noachian epoch, which places the area's age at 3.8 to 3.5 billion years ago.〔(【引用サイトリンク】 work=lpi.usra.edu )〕 At the highest point on its rim, it is about 6,400 metres above zero altitude, and it is about 5,100 metres at the crater bottom, giving it a depth of 1.3 kilometres.〔 ==References== 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「Virrat (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.