Saturn's Ring System Has a Very Sharp Outer Edge Because

question 31

Multiple Choice

Saturn's ring system has a very sharp outer edge because

• A) particles at the edge have a 7:6 orbital resonance with a pair of co-orbiting moons that lie just outside the rings.
• B) the edge marks the Roche limit.
• C) of a pair of shepherding moons.
• D) Saturn has a thicker atmosphere than Earth.

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