Книга: Planetary Ring: Cosmic Dust, Orbit, Planet, Rings of Saturn, Saturn, Gas Giant, Solar System, Jupiter, Uranus, Rhea, Rings of Rhea

High Quality Content by WIKIPEDIA articles! A planetary ring is a ring of cosmic dust and other small particles orbiting around a planet in a flat disc-shaped region. The most spectacular planetary rings known are those around Saturn, but the other three gas giants of the solar system (Jupiter, Uranus and Neptune) possess ring systems of their own.Recent reports have suggested that the Saturnian moon Rhea may have its own tenuous ring system, which would make it the only moon known to possess a ring system.