Long-term changes to the system include collisions and crossing ring systems.

If they have to ring some inflation out of the system, the initial list of victims has to include housing markets. You have a risky period for consumers for the next six to eight months.

Moons appear and disappear; rings appear and disappear.

We don't think that is at all coincidental.

This appears to be a random or chaotic process, where there is a continual exchange of energy and angular momentum between the moons.

Now we're realizing that planetary systems are continually evolving. They change at a slower rate as they get older, but they continue to change.