This pair of composite images from the Hubble Space Telescope shows newly discovered rings around Uranus. The outermost of the two rings (R/2003 U1) is thought to be replenished by dust tossed off of a newly discovered moon, named Mab, which shares an orbit with the ring. Mab is visible as a bright streak at the top of the outer ring.

NASA, ESA, and M. Showalter (SETI Institute)