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Name: david a maxa
Status: N/A
Age: N/A
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Date: 1993 - 1999

Why is it that rings only form around gas giants?

There's a couple of possible reasons:

1) a minimum planetary mass is needed before a planet can have rings, and in our solar system only the gas giants have enough mass.

2) rings can only form around planets in the outer part of a solar system, and in our system these planets all happen to be gas giants (except, of course, for Pluto which is actually a small binary planet with its moon Charon -- not enough mass for rings)

The real reason may be a combination of 1) and 2)


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