翻訳と辞書 Words near each other ・ Geometric median ・ Geometric modeling ・ Geology of the Canyonlands area ・ Geology of the Capitol Reef area ・ Geology of the Dallas–Fort Worth Metroplex ・ Geology of the Death Valley area ・ Geology of the English counties ・ Geology of the Falkland Islands ・ Geology of the Faroe Islands ・ Geology of the Grand Canyon area ・ Geology of the Grand Teton area ・ Geology of the Himalaya ・ Geology of the Iberian Peninsula ・ Geology of the Isle of Wight ・ Geology of the Lassen volcanic area ・ Geology of the Moon ・ Geology of the Netherlands ・ Geology of the North Sea ・ Geology of the Northland Region ・ Geology of the Pacific Northwest ・ Geology of the Pacific Ocean ・ Geology of the Pyrenees ・ Geology of the Raukumara Region ・ Geology of the Rocky Mountains ・ Geology of the Tasman District ・ Geology of the Tosham area, Haryana ・ Geology of the United States ・ Geology of the Waikato-King Country Region ・ Geology of the Wellington Region ・ Geology of the Western Carpathians Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Geology of the Moon ： ウィキペディア英語版 Geology of the Moon The geology of the Moon (sometimes called selenology, although the latter term can refer more generally to "lunar science") is quite different from that of Earth. The Moon lacks a significant atmosphere, which eliminates erosion due to weather; it does not have any form of plate tectonics, it has a lower gravity, and because of its small size, it cooled more rapidly. The complex geomorphology of the lunar surface has been formed by a combination of processes, especially impact cratering and volcanism. The Moon is a differentiated body, with a crust, mantle, and core. Geological studies of the Moon are based on a combination of Earth-based telescope observations, measurements from orbiting spacecraft, lunar samples, and geophysical data. A few locations were sampled directly during the ''Apollo'' missions in the late 1960s and early 1970s, which returned approximately 380 kilograms (838 lb) of lunar rock and soil to Earth, as well as several missions of the Soviet ''Luna'' programme. The Moon is the only extraterrestrial body for which we have samples with a known geologic context. A handful of lunar meteorites have been recognized on Earth, though their source craters on the Moon are unknown. A substantial portion of the lunar surface has not been explored, and a number of geological questions remain unanswered. ==Elemental composition== Elements known to be present on the lunar surface include, among others, oxygen (O), silicon (Si), iron (Fe), magnesium (Mg), calcium (Ca), aluminium (Al), manganese (Mn) and titanium (Ti). Among the more abundant are oxygen, iron and silicon. The oxygen content is estimated at 45% (by weight). Carbon (C) and nitrogen (N) appear to be present only in trace quantities from deposition by solar wind. Neutron spectrometry data from the Lunar Prospector indicate the presence of hydrogen (H) concentrated at the poles.〔(【引用サイトリンク】 DISTRIBUTION OF HYDROGEN AT THE SURFACE OF THE MOON )〕 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「Geology of the Moon」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.