Jack Jonathan Lissauer (born 1957) is an American research scientist who has worked for NASA's Ames Research Center since 1996. He is a science co-investigator on the Kepler space telescope mission. (wikipedia)
We don't think that is at all coincidental.
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.
Moons appear and disappear; rings appear and disappear.
Long-term changes to the system include collisions and crossing ring systems.
The destruction and accumulation of moons and rings is very exciting. It's showing how this system is very rapidly evolving and showing that the processes which led to the formation of the planets (are) still ongoing today.
The solar system is not a stable and quiet place.
This appears to be a random or chaotic process, where there is a continual exchange of energy and angular momentum between the moons.
