Resources Trough in Dark and Bright on Vesta Photojournal: PIA15221 Source: NASA/JPL-Caltech/UCLA/MPS/DLR/IDA Published: December 21, 2011 This image, one of the first obtained by NASA's Dawn spacecraft in its low altitude mapping orbit, shows a part of one of the troughs at the equator of the giant asteroid Vesta. ENLARGE