Picture This

A tapestry of rippling sand dunes on Mars

12 May 2018 Astronomy Now

Surrounding about a quarter of Mars’ northern polar cap is a vast field of crescent-shaped barchan sand dunes covering an area larger than the U.S. state of California. Seen in summer when the dunes were free of frost, Odyssey captured a stunning tapestry of unearthly wind-blown beauty.