This image was made by combining data from HiRISE's blue/green, red, and near-infrared channels. The color data accentuate details not apparent in the black and white images. For example, materials near the rim of Stickney appear bluer than the rest of Phobos. Based on analogy with materials on our own moon, this could mean this surface is fresher, and therefore younger, than other parts of Phobos.
Credit: NASA/JPL/University of Arizona.
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