2015年6月5日 星期五

Fresh Crater Near Sirenum Fossae Region of Mars


The HiRISE camera aboard NASA's Mars Reconnaissance Orbiter acquired this closeup image of a "fresh" (on a geological scale, though quite old on a human scale) impact crater in the Sirenum Fossae region of Mars on March 30, 2015. This impact crater appears relatively recent as it has a sharp rim and well-preserved ejecta. via NASA http://ift.tt/1H8Lm0g

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