Saturn Saturn is one of the largest and most beautiful planets in the star system. Saturn is the second largest planet in the solar system second to only Jupiter. Saturn's many rings give the planet it's beauty along with its dark orange and red color. Saturn is much like Jupiter they are both gaseous planets with small rocky cores but Saturn is far less dense than Jupiter in fact its the least dense planet in the solar system. It's density is only 0.69 g/cm making it less than water. If Saturn was put in water it would float. Saturn is 764 times larger than earth and 96 times more massive. Saturn rotates completely on its ax