Today's VIS image was collected at the same time as yesterday's IR image. In the visible wavelengths, the dunes are darker than their surroundings. Compare to yesterday's IR image, where the dunes are bright because of their warmer temperature.
Orbit Number: 51157 Latitude: -43.6777 Longitude: 34.3986 Instrument: VIS Captured: 2013-06-26 05:33
Photo credit: NASA/JPL/Arizona State University