If the Voyager spacecraft showed too many rings to number, the view from Earth is much simpler - we see only three. The outermost ring is called the A ring and it is 14500km wide. It is separated from the B ring by the dark gap of the Cassini division 4200 km across. The B ring is both brightest and at 26000 km across the widest. For those with larger instruments, there is also a small gap in the outer aspects of the A ring called the Encke division.
All rings are a collection small particles orbiting the planet in complex ways.
This was illustrated more so when the planet and rings occulted the bright star 28 Sagittari in 1989. The occultation revealed even more structure in the rings than did the voyager images. Saturn's rings are probably transitory. They originated when one or more moons strayed too close to Saturn to withstand its tidal force and broke apart. Many scientists now think the rings will last only a few tens of millions of years before mutual collisions rob the particles of energy and they spiral into Saturn.