NASA’S Curiosity’s Rover is studying an active sand dune on Mars along the northwestern flank of Mars’ Mount Sharp. This image was taken on Jan. 20, 2016, during the 1,229th Martian day.
Mount Sharp, officially Aeolis Mons, is a mountain (5.5 km or 18,000 ft high) on Mars that forms the central peak within the Gale crater.
Curiosity has been on Mars for 1263 days since landing on August 6, 2012. Since September 11, 2014, Curiosity has been exploring the slopes of the mountain.