Saturn’s invisible ring, and two faced moon

The largest ring in the solar system is nearly impossible to see. Not even the Cassini mission, which spent 13 years orbiting Saturn, was able to see it. Just to make things more interesting, Saturn also has a now-you-see-it-now-you-don’t moon. As it happens, these two oddities are related, so we relate them.

Here are a couple of articles about the Phoebe ring.

Saturn's largest ring

Huge 'ghost' ring discovered around Saturn

Here’s an article about the two faces of Iapetus.

Astronomers decode two-faced moon

Here’s something on Iapetus’s equatorial ridge.

What's this ridge on Iapetus?

And here are a couple little pages on a couple of little Saturnian moons, Pan and Atlas.

In Depth | Pan

In Depth | Atlas