Ancient Impacts Stained Vesta with Carbon-Rich Material

Composite-color 3D image of Cornelia crater on Vesta (NASA/JPL-Caltech/UCLA/MPS/DLR/IDA) Ever since arriving at Vesta in July 2011, NASA's Dawn spacecraft has been capturing high-resolution images of the protoplanet's surface, revealing a surprisingly varied and complex terrain covered in ridges, hills, grooves and, of course, craters of many different sizes and ages. Many of Vesta's craters exhibit