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.
Here’s an article about the two faces of Iapetus.
Here’s something on Iapetus’s equatorial ridge.
And here are a couple little pages on a couple of little Saturnian moons, Pan and Atlas.