Jupiter's moon #Callisto is a battered ball of dirty ice that is larger than the #planet Mercury.
It was visited by the Galileo spacecraft in the 1990s and 2000s, but the recently reprocessed featured image is from a flyby of #Voyager 2 in 1979.
The #moon would appear darker if it weren't for the tapestry of light-colored fractured surface ice created by eons of impacts.
The interior of Callisto is potentially even more interesting because therein might lie an internal layer of liquid water.
This potential underground sea is a candidate to harbor life -- similar with sister moons #Europa and #Ganymede.
Callisto is slightly larger than Earth's Moon, but because of its high ice content is slightly less massive.
https://apod.nasa.gov/apod/ap250901.html