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Ghost craters on Mercury : ウィキペディア英語版 | Ghost craters on Mercury Ghost craters on the planet Mercury have tectonic features such as graben and wrinkle ridges. These features were formed by extensional and contractional forces originating in tectonic processes such as uplift and global contraction. The combination of graben and wrinkle ridges inside ghost craters found on Mercury has not been observed on any of the other terrestrial planets. ==Discovery== The tectonic features on Mercury were not studied in precise detail until the MESSENGER spacecraft was sent to Mercury; by 2009 the MESSENGER spacecraft had mapped 98% of the planet's surface.〔(【引用サイトリンク】url=http://messenger.jhuapl.edu/index.php )〕 By 2013, Messenger mapped 100% of the planet's surface.〔(【引用サイトリンク】url=http://www.nasa.gov/mission_pages/messenger/media/Imaged100Percent.html#.Uz23vPldWzk )〕 Mercury Dual Imaging System cameras and Mercury Laser Altimeter equipment on the messenger spacecraft allowed for researchers to obtain high-resolution images of the planet's surface for analyzing Mercury's tectonics.〔
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「Ghost craters on Mercury」の詳細全文を読む
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