Saturn's rings are located around the planet's equator yet when viewed from Earth, Saturn's rings appear to shift longitudinally.

Saturn is very similar in composition to Jupiter, with liquid hydrogen and liquid metallic hydrogen comprising a majority of its mass.  There are a few major differences though.

Saturn has a weaker force of gravity than Jupiter.  This means the molecules that make up the gasses that form Saturn are not packed together as tightly as they are on Jupiter.  This results in Saturn being the only planet in the solar system that has a density that is less than water.  If you had a bathtub big enough, Saturn would float in it!