NASA -- The latest 500 images of the Cassini-Huygens satellite are on NASA's site and most of those images will never make the rounds as parts of press releases. With its stunning rings and dozen of moons, Saturn has intrigued schools groups for ages. Barely smaller than Jupiter, it formed four billion years ago and it is made mainly of gas. It is also the only known planet that is less dense than water, meaning that if it could be placed inside an imaginary gigantic bathtub it would float. Saturn has a huge magnetosphere and a stormy atmosphere, with winds clocked at 1,118 mph near its equator.
JPL -- "Cassini-Huygens Mission"