Four Views of Mars in Northern Summer
The group of three dark specks just left of center are all that remain of Cerberus, a very prominent dark region during the Viking and Mariner 9missions. This is an example of the remarkable large scale changes which can occur on Mars due to windblown dust: the former dark area has now been covered by a layer of bright dust, masking the underlying material.
Last Update: 1 September 2019