Moon and ring collide

I didn't think they were that close together. [Link]

This is absolutely astounding! The Cassini spacecraft captured a collision between Saturn's moon Prometheus and the F ring, which creates a "streamer;" material being pulled from the ring by the moon's gravity, leaving behind a dark channel. There's even a movie of the event! The creation of these streamers and channels occurs in a cycle that repeats during each of Prometheus' orbits. During its 14.7 hour orbit of Saturn, when Prometheus reaches apoapse, or where it is farthest away from Saturn and closest to the F ring, the oblong moon draws a streamer of material from the ring. But since Prometheus orbits faster than the material in the ring, this new streamer is pulled from a different location in the ring about 3.2 degrees (in longitude) ahead of the previous one. In this way, a whole series of streamer-channels is created along the F ring, and Cassini has captured more images showing what are called streamer-channels.