Cassini - Three Moons

A big object passing through the rings would make a good image, stereo or not.. but there's no way a 'moon' that passed through the rings would remain a 'moon' for long. I fail to see how an object that crashed through the rings multiple times (much less once) would ever reach any moon-type orbit.

Actually, I suppose if an object were tough enough it could simply swing through the rings a few times until it lost enough momentum to end up orbiting inside the rings..

I think you guys need to brush up on your orbital mechanics or the Saturnian system or something.

How so?

The Saturnian system with rings and moons are very well ordered with all larger and smaller moons outside the rings. Only some few really tiny moons are within the ring system itself.

You really havnt read ANY textbooks on astronomy? Well im happy to tell in any case:
I think some of you guys here are fooled by the geometry of the image, the small moons that appear to be below the ringplane are in fact much closer to Cassini.

Now this is weird. One of the larger moons appears to be inside the f-ring.
FullS08/N00027163.jpg

http://saturn.jpl.nasa.gov/multimedia/images/raw/raw-images-details.cfm?feiImageID=30642

There's no reason why a 'large' (whatever you want to consider large) object couldn't orbit around Saturn inside the ring. It would probably be a rarer event than Saturn capturing an object that then orbited outside the ring, but it still must be possible..

However, if a large object orbited inside the ring, it would create a gap in the ring quite a bit larger than itself.

By 'inside' I don't mean in the ring, I mean inside the ring's innermost extent. Thus, if the ring stretched from 100000 km to 200000 km away, a moon orbiting at 50000 km would be 'inside' the ring.

Oh, ok.

If you wanna read about weird orbiting, look up Janus and Epimetheus.