2 cm, resolution 1.5 arcsec image of Saturn; rings are wide open. The A and B rings are clearly visible. Saturn is the sixth planet from the Sun and the second-largest in the Solar System, after Jupiter. It is a gas giant with an average radius about nine times that of Earth. Although only one-eighth the average density of Earth, with its larger volume Saturn is just over 95 times more massive. Saturn is named after the Roman god of agriculture. Saturn has a prominent ring system that consists of nine continuous main rings and three discontinuous arcs and that is composed mostly of ice particles with a smaller amount of rocky debris and dust. 62 moons are known to orbit Saturn, of which 53 are officially named. This does not include the hundreds of moonlets comprising the rings.