Frost-covered Dunes II Size:54" x 36" (137 cm x 91 cm) The relatively bright

The relatively bright

peeps out from behind the larger

out in one of the Milky Way's spiral arms

objects from the Solar System came and went through the star fields

Frost-covered Dunes II Size:54" x 36" (137 cm x 91 cm) The relatively brightDunes are often found on crater floors. In the winter, at high northern latitudes, the terrain is covered by carbon dioxide ice (dry ice). In the spring, as this seasonal ice sublimes, many unusual features unique to Mars are visible. On the floor of this crater where there are no dunes, the ice forms an uninterrupted layer. On the dunes, however, dark streaks form as surface material from below the ice is mobilized and deposited on top of the ice. In