Rheasilvia
Rheasilvia The asteroid Vesta as seen by the Dawn spacecraft. What could have caused the ripples around its equator seen in the top image? Possibly the massive impact that carved out Rheasilvia Basin at the south pole, shown in the middle image. Finally, an elevation map showing the feature's extreme topography. NASA/JPL/UCLA/MPS/DLR/IDA/PSI

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