The particles in Saturn's rings:
A) move in circular orbits; the outer particles move fastest because they are farthest from the planet.
B) revolve in different directions depending on the distance from the planet; the reversal of this direction is at the Cassini division.
C) all move as if they were one solid disk.
D) move in circular Keplerian orbits; the inner particles move fastest.

Question

Quizplus · Accepted Answer

The particles in Saturn's rings move in circular Keplerian orbits, which means they move at different speeds depending on their distance from Saturn. The Keplerian orbits of the particles in the rings also mean that the inner particles move fastest.

The Particles in Saturn's Rings