Clumps in Saturn's F ring

These images taken by the NASA/ESA/ASI Cassini-Huygens spacecraft show clumps which seem to be embedded within Saturn’s narrow, outermost F ring.

The narrow-angle camera took the images on 23 February 2004, from a distance of 62.9 million kilometres. The two images taken nearly two hours apart show these clumps as they revolve about the planet. The small dot at centre right in the second image is one of Saturn's smaller moons, Janus, which is 181 kilometres across.