Ring system
Ring of cosmic dust orbiting an astronomical object / From Wikipedia, the free encyclopedia
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A ring system is a disc or torus orbiting an astronomical object that is composed of solid material such as dust and moonlets. Ring systems are a common component of satellite systems around giant planets like Saturn. A ring system around a planet is also known as a planetary ring system.[1]
The most prominent and most famous planetary rings in the Solar System are those around Saturn, but the other three giant planets (Jupiter, Uranus, and Neptune) also have ring systems. Ring systems around minor planets have been discovered via occultations, as well. There are also dust rings around the Sun at the distances of Mercury, Venus, and Earth, in mean motion resonance with these planets.[1][2][3] Evidence suggests that ring systems may also be found around other types of astronomical objects, including moons, brown dwarfs, and other stars.