The Enigmatic Satellites of Saturn Gary Peterson Professor Emeritus Department of Geological Sciences San Diego State University Saturn, everyone's favorite planet, is the second-largest of the outer giant gas planets and has the lowest density (0.7) of any planet. The others gas planets are about 1.5. In addition, Saturn has the largest satellite (Titan) in the Solar System. Titan is about the same size as Mercury of the inner Solar System. How can this be? It is suggested that...

Voyager II, a NASA spacecraft, demystifies Saturns's rings; Further analysis of dust particle patterns (called spokes) on space images of the planet lead to the conclusion that the spokes move with Saturn's magnetic field and not sporadically.A look back at Voyager II's incredible images of Saturn.