Winter in Argyre

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Over billions of years, the southern uplands of Mars have been pockmarked by numerous impact features, which are often so closely packed that they overlap. One such feature is Hooke crater, shown in this frost-tinged scene, imaged by ESA’s Mars Express during winter in the southern hemisphere.

via ESA Space Science

http://www.esa.int/Our_Activities/Space_Science/Mars_Express/Winter_in_Argyre