Two impact craters surrounded by an unusual ejecta blanket dominate this high-resolution Galileo SSI mosaic of the surface of Ganymede. Galileo imaged this region as it passed Ganymede during its second orbit through the Jovian system on September 6, 1996 at a resolution of 86 meters (287 feet) per pixel. North is to the top of the picture and the sun illuminates the surface from the southeast. Nergal, the larger crater, is about 8 kilometers (5 miles) in diameter, while the smaller (unnamed) crater to its west is 3 kilometers (1.8 miles) across. This mosaic was created by unmannedspaceflight.com user OWW.

NASA / JPL / OWW