Rhea has a ring?

Via james_nicoll: Cassini finds evidence of a debris disk and ring orbiting Saturn's moon Rhea. This would be the first known moon ring, and, as far as I know, the first evidence of natural material orbiting a moon.

Rhea is Saturn's second largest moon after Titan, but it never got much exciting press because it just sort of looks like a larger and less spectacular version of Dione. But this is something new, and further proves that the Saturn system is the solar system's premier home for weird orbital mechanics.