The Rings of Saturn are not the only rings. All of the gas giant planets--Jupiter, Saturn, Uranus and Neptune--have rings. It's just Saturn's are the easiest to see.
Also, one moon might have a ring around it: Rhea, one of Saturn's larger moons. Wouldn't that be a ring that zings around another ring?
Scientists think that Phobos, one of Mars' moons, will eventually breakup and become a ring. Phobos' has a very low orbit around Mars and getting lower all the time until, eventually, it is broken into pieces by Mars' gravity. Or so they think!
And they assume Earth once had a ring. That was after Theia hit the Earth and created the moon. What's that??? I'll tell you next time......
PIA07712_-_F_ring_animation.gif
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