Mars’ proximity to our solar system’s asteroid belt makes it an easy target for space objects. Here we see the cascading dunes of the Rabe Crater, which is located in the right side of the image. This false-color image was taken by the Thermal Emission Imaging System (THEMIS) on NASA's Mars Odyssey spacecraft. As NASA describes the image, “the colors portray the overnight surface temperatures: bluer colors indicate cold places, redder tints warm ones.” The Rabe Crater was discovered by German astronomer Wilhelm F. Rabe (1893-1958). It is 108 km in diameter and exists halfway between Mars’ equator and South Pole.