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Phillips Crater is a crater in the Mare Australe quadrangle of Mars, located at 66.7° south latitude and 45.1° west longitude. It is 190.2 km in diameter and was named after John Phillips, a British geologist (1800–1874), and Theodore E. Philips, a British astronomer (1868–1942). In this area one can often see polygons. Polygons are common where wet ground freezes and thaws. The polygons here are especially visible because there is snow in the cracks between the polygons. The enlarged picture below shows these features. Wikiphilips.jpg|Phillips Crater as seen by CTX camera (on Mars Reconnaissance Orbiter). Wikiphilipspolygons.jpg|Phillips Crater showing polygons with ice in cracks between polygons, as seen by CTX camera (on Mars Reconnaissance Orbiter). Note this is an enlargement of a previous image. Philips Crater Area.JPG|Phillips Crater Area, as seen by HiRISE. ==See also== * Climate of Mars * Geology of Mars * Impact crater * List of craters on Mars 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「Phillips (Martian crater)」の詳細全文を読む スポンサード リンク
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