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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 Herschel (Mimantean crater) ： ウィキペディア英語版 Herschel (Mimantean crater) Herschel is a huge crater in the leading hemisphere of the Saturnian moon Mimas, on the equator at 100° longitude. It is named after the eighteenth century astronomer William Herschel, who discovered Mimas in 1789. Herschel is the largest crater relative to its parent body of any equilibrium planetary moon in the Solar System.〔Craters on small moons such as Stickney may be comparably large (); the moons of dwarf planets have not been imaged.〕 It is so large that astronomers have expressed surprise that Mimas was not shattered by the impact that caused it. It measures 〔 across, almost one third the diameter of Mimas. Its walls are approximately high,〔 parts of its floor are deep, and its central peak rises above the crater floor. If there were a crater of an equivalent scale on Earth it would be over in diameter and wider than Canada, with walls over high. The impact that formed Herschel must have nearly disrupted Mimas entirely. Chasmata that may be stress fractures due to shock waves from the impact traveling through it and focusing there can be seen on the opposite side of Mimas. The impact is also suspected of having something to do with the current 'Pac-Man'–shaped temperature pattern on Mimas. Herschel has an estimated age of around 4.1 billion years〔(【引用サイトリンク】 title=Impact Crater Size-Frequency Distribution (SFD) and Surface Ages on Mimas. )〕 . ==Media reception== The similarity between Mimas's appearance and the Death Star in ''Star Wars'' due to the large size of Herschel has often been noted, both in the press and in NASA/JPL press releases.〔(【引用サイトリンク】 title=Remote Sensing Tutorial Page 19-18 "Saturn and its Moons" )〕〔(【引用サイトリンク】 title=PIA12570: Flying by the "Death Star" Moon )〕 This is a coincidence, however, as the crater was not discovered until 1980, three years after the film was made. 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「Herschel (Mimantean 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.