Saturn's diameter is 120,540 km, compared with the Earth's 12,756, and its mass is equal to 95 Earths. Considering the huge size of the planet, this mass is very low, and corresponds to an average density 0.7 that of water. We used to think that Saturn's rings are much younger than the planet, and soon to be disrupted by the minute gravitational tugs of Saturn's many moons. Now we know that's not true. Saturn's rings are probably as old as the planet.
Titan is larger than our moon and unique in the solar system in having an atmosphere.
It is made up of ammonia and methane, spiced with complex organic compounds. Saturn, with its rings and moons forms one of the most fascinating collections of objects in the Solar System. In a few years, when the Cassini spacecraft arrives, we will solve a few mysteries and unearth a thousand more. That is what makes our universe so intriguing. Jupiter hangs like a searchlight in the southern sky.