chorus: Clouds on Mars, photographed by Mars Express, 20th December 2005.
Around 70°S 192°E on the southern Terra Sirenum; this composite is about 50 by 75km. Charlier Crater is partially seen at top. The clouds might be dust picked from the dark region below, but I’m not sure.
Composite of 8 images: 3 (red, green, and blue light) for colour, and 5 monochromatic (ish) in sequence for motion. The colours are probably more suggestive than naturalistic.
Image credit: ESA. Animation: AgeOfDestruction.