We speak of a system because there is not only one ring but countless, almost an infinity. The rings of Saturn are unique in the solar system because they are both very extended and very bright. From the Earth it seems that there is only one ring smooth and compact. In reality, like those of Jupiter, these rings do not form a compact and united surface.
It is pebbles of all sizes and frozen gathered under the effect of gravity. It is even probable that by traveling very slowly we can cross the rings without accident. That said, it's an experience that astronauts would never do except in a simulation program or at the cinema!
Depending on their brightness, the rings were divided into different parts, from the outside to the inside: the ring A; ring B, the brightest; the darkest C ring and the D ring that almost touches Saturn's upper atmosphere.
It is not known exactly how the rings formed. They may be the residue of a two-star or moon collision that never formed. One thing is for sure, in the place where they are no satellites cannot keep up because Saturn's attraction would destroy it and it would scatter around Saturn just forming a ring.
Saturn bending over its orbit, its rings are also inclined 26.7 ° to the orbital plane of the planet. Turning around the Sun in 29 years and a half, every 15 years or so the rings pass in the plane of Earth's orbit and since they are then aligned with the Earth, they become invisible for a few months.
Although they are very large (650000 km from one end to the other) all of a sudden Saturn loses its ring and even in a large telescope we do not see them so much they are thin: 1.3 km thick! If you represent the ring in small, they are not thicker than a sheet of cigarette paper!