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Stoney (Martian crater) : ウィキペディア英語版 | Stoney (Martian crater) Stoney Crater is an impact crater in the Mare Australe quadrangle of Mars, located at 69.8°S latitude and 138.6°W longitude. It is 171.0 km in diameter and was named after George Johnstone Stoney, and the name was approved in 1973 by the International Astronomical Union (IAU) Working Group for Planetary System Nomenclature (WGPSN).
Wikistoney.jpg|East side of Stoney (Martian crater), as seen by CTX camera (on Mars Reconnaissance Orbiter).
==Why craters are important== The density of impact craters is used to determine the surface ages of Mars and other solar system bodies.〔http://www.lpi.usra.edu/publications/slidesets/stones/〕 The older the surface, the more craters present. Crater shapes can reveal the presence of ground ice.
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「Stoney (Martian crater)」の詳細全文を読む
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