Hubble Views Collossal Polar Cyclone on Mars

Color polar view of the north polar region, showing the location of the storm relative to the classical bright and dark features in this area. The colour composite data (410, 502, and 673 nm) indicate that the storm is fairly dust-free and therefore likely composed mostly of water ice clouds. The bright surface region beneath the eye of the storm can be seen clearly. This map covers the region north of 45 degrees latitude, and is oriented with 0 degrees longitude at the bottom.