Black Holes in Caloris
With the sun low in the sky to the west, the interiors of craters are completely hidden in shadow and even the smallest surface features cast shadows. In this light, the cratered interior of the Caloris basin takes on a rough and formidable appearance, though its volcanic plains are actually smoother than much of the planet.
Date acquired: July 25, 2011
Image Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington