Ring systems

Definition

Ring systems are collections of dust, ice, and rock particles that orbit around planets in a flat, disc-like formation. These rings vary greatly in size, thickness, and particle composition depending on the planet they encircle.

5 Must Know Facts For Your Next Test

1. Saturn's rings are the most extensive and studied ring system in our solar system.
2. The particles in planetary rings can range from micrometers to meters in size.
3. The Roche limit is the distance within which a celestial body will disintegrate due to tidal forces exceeding gravitational self-attraction.
4. Enceladus, one of Saturn's moons, contributes material to Saturn's E ring through its geysers.
5. Planetary rings can be temporary features that dissipate over time or stable structures lasting for millions of years.

Review Questions

• What factors determine the composition and structure of a planet's ring system?
• How does Enceladus contribute to Saturn's E ring?
• Why are Saturn's rings more prominent compared to those of other planets?

Related terms

Roche Limit:

The minimum distance at which a celestial body can orbit without being torn apart by tidal forces.

Enceladus:

A moon of Saturn known for its icy geysers that feed material into Saturn's E ring.

Shepherd Moons:

Small moons that orbit near the edges of planetary rings and help maintain their sharp boundaries through gravitational influences.