Shapes on Mars
Sunlight was just starting to reach the high Northern latitudes in late winter when HiRISE captured this image of part of the steep scarps around portions of the North Polar layered deposits. The sunlight is highly diffused by atmospheric scattering, with the sun less than 0.5 degrees above the horizon. This diffuse light gives the image a unique appearance, almost like a painting. The surface is entirely covered by carbon dioxide frost mixed with dust.
Image: NASA/JPL/University of Arizona [high-resolution]
Caption: Alfred McEwen
