This image from NASA Dawn spacecraft shows small rilles scars on asteroid Vesta surface, mostly concentrated in the right half image, presumably due to impacts throwing out boulders, which crash across the surface scouring the rilles as they go.
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Details
Title: Rilles on Vesta Surface
Creator: NASA/JPL-Caltech/UCLA/MPS/DLR/IDA
Date Created: 2011-10-24
Rights: JPL
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