When Summer "Falls"... (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)

Caption NASA:"Autumn has begun in the Southern Hemisphere of Mars. As the Sun retreats northward frost will begin to accumulate. The frost-free Floor of this Unnamed Crater, with it's intricate texture, will soon be hidden. Due to Mars' orbit, the seasons are twice as long as on Earth - so it will be a full earthyear before this Crater Floor is exposed again".