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Inter-crater plains on Mercury : ウィキペディア英語版 | Inter-crater plains on Mercury Inter-crater plains on Mercury are a land-form consisting of plains between craters on Mercury. Of the eight planets in the solar system, Mercury is the smallest and closest to the Sun. The surface of this planet is similar to the Moon in that it shows characteristics of heavy cratering and plains formed through volcanic eruptions on the surface. These features indicate that Mercury has been geologically inactive for billions of years. Knowledge of Mercury's geology was initially quite limited because observations have only been through the Mariner 10 flyby in 1975 and observations from Earth. The MESSENGER (an acronym of MErcury Surface, Space ENvironment, GEochemistry, and Ranging) mission of 2004 is a robotic NASA spacecraft orbiting the planet, the first spacecraft ever to do so. MESSENGER has given additional data which has revealed that Mercury is geologically complex. == Types of plains ==
There are two geologically distinct types of plains on Mercury - smooth plains of volcanic origin, and, inter-crater plains, of uncertain origin.
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「Inter-crater plains on Mercury」の詳細全文を読む
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