| 翻訳と辞書 |
| Beethoven (crater) ： ウィキペディア英語版 |
Beethoven (crater)
Beethoven is a crater at latitude 20°S, longitude 124°W on Mercury. It is 643 km in diameter and was named after Ludwig van Beethoven.〔 It is the eleventh largest named impact crater in the Solar System and the third largest on Mercury.
Unlike many basins of similar size on the Moon, Beethoven is not multi-ringed. Remnant ejecta blankets around parts of the Beethoven are subdued in appearance and their margins poorly defined in places. The crater wall (rim) of Beethoven is buried by its ejecta blanket and by plains materials and is barely visible.〔 The floor of the basin is covered with intermediate smooth plains material, which has the same reflectance as the exterior intermediate terrain. However there is no wrinkle ridges or graben inside the basin like those in Caloris.〔
Spudis and Prosser have suggested that Beethoven may possibly be late c3 in age or as old as early c2, which means that it is older than the Caloris Basin. The depth of Beethoven is estimated to be from the stereo derived digital elevation models based on Mariner 10 images of the planet. This is significantly less than the depth of lunar basins of the similar size indicating that Beethoven probably has relaxed from its post impact shape. There is also a broad topographic rise in the north–west margin of Beethoven.
==Notes==
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「Beethoven (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.
|
|