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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 Proctor (lunar crater) ： ウィキペディア英語版 Proctor (lunar crater) Proctor is the remnant of a lunar crater that is located to the southeast of the prominent crater Tycho. It lies just to the north of the huge walled plain Maginus. To the north is the crater Saussure and to the northwest, just to the east of Tycho, lies Pictet. Proctor is 52 kilometers in diameter and its walls are 1,300 meters high. It is from the Pre-Imbrian period, which lasted from 4.55 to 3.85 billion years ago.〔''Autostar Suite Astronomer Edition''. CD-ROM. Meade, April 2006.〕〔(【引用サイトリンク】 work=luna.e-cremona.it ) 〕 The outer rim of this crater has become heavily worn and eroded, and now forms a low, irregular rise around the interior floor. Much of the northwestern half of the rim is marked by a number of small craters, including Proctor D. The interior floor is somewhat level and is marked only by a few tiny impacts. The crater is named after the 20th-century American astronomy writer Mary Proctor.〔 ==Satellite craters== By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Proctor. 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「Proctor (lunar 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.