Resources Patterns in Vesta's Regolith Photojournal: PIA15794 Source: NASA/JPL-Caltech/UCLA/MPS/DLR/IDA Published: June 8, 2012 This image from NASA's Dawn spacecraft shows linear grooves and ridges in Vesta's regolith, located in Vesta's Tuccia quadrangle, in asteroid Vesta's southern hemisphere. ENLARGE