Saturn is the sixth planet from the Sun. It is the second largest of the four gas giants in the solar system, but is also the lightest, with one half the density of Jupiter.
The planet has an extensive system of rings, composed of icy particles ranging in size from pebbles to beach balls.
The composition of the planet is thought to be very similar to that of Jupiter, with a silicate core surrounded by liquid hydrogen, and a deep gaseous hydrogen atmosphere. This atmosphere is cooler than Jupiter's and, while displaying similar banding; the coloring is less vivid, due to a haze of ammonia crystals at its outer reaches. Wind speeds of up to 1,400 km/h have been detected, giving an indication of extreme meteorological activity.