This infrared image from NASA 2001 Mars Odyssey spacecraft shows part of the dune field on the floor of Rabe Crater. The dunes are brighter than the surrounding material, indicating that they are warmer.
Rabe Crater Dunes
This infrared image from NASA 2001 Mars Odyssey spacecraft shows part of the dune field on the floor of Rabe Crater. The dunes are brighter than the surrounding material, indicating that they are warmer.