How (and when) did the rings of Saturn form? How are we to understand the complex systems of rings and gaps?

How (and when) did the rings of Saturn form? How are we to understand the complex systems of rings and gaps?
It is time for Cassini to say goodbye! But before it ends its mission, it will have a grand finale for us.
January would not be so exciting if it weren’t for the two times we can see a close encounter between the Moon, Venus, and Mars. Also visible this month are Jupiter, Saturn, and maybe Mercury.
October brings us good views of Venus, Saturn, Mars, and Jupiter, the Orionid Meteor Shower, and night launch visible on the eastern seaboard, along with a challenge for the Pequea Valley Planetarium