Rhea is the second-largest moon (949 miles or 1,527 kilometers across) of Saturn and the ninth-largest moon in the Solar System.
Discovered by Giovanni Domenico Cassini on December 23, 1672, the moon appears dazzlingly bright in full sunlight in this photo captured by the Cassini spacecraft.
Rhea has an ancient surface which is one of the most heavily cratered of all of Saturn’s moons. Subtle albedo variations across the disk of Rhea hint at past geologic activity.
The image was captured on June 3, 2016 using a spectral filter which preferentially admits wavelengths of ultraviolet light at a distance of approximately 365,000 miles (587,000 kilometers).