Saturn

Class:   Planet (orbiting Sol)

Facts:

Due to its low density Saturn would float in water.
95x the size of Earth.
Rings are less than 1km thick.
Rings are made of icy material, probably originally from a disrupted moon. Replenished from different sources, eg comets, meteors, moons. Chunks range in size from pebble to room-size.
Minir moon in rings create interesting effects.
Rings change constantly, and will eventually disappear.
North pole hexagon.
Been visited by Pioneer 11 (1979), Voyagers (1980 & 1981) and Cassini.

Details:

Rotation period:  10 hrs 14 mins (eq) 10 hrs 38 mins (high latitude)
Atmosphere:  93% Hydrogen, 7% Helium