The following new images taken by the Imaging Science Subsystem (ISS) on the Cassini spacecraft are now available:

• Saturn's Watch Spiral (Released 5 May 2008)
  Spiral density waves in Saturn's A ring reveal the gravitational signatures of distant moons as they subtly tug on the countless particles orbiting in the ring plane.
  


• Ancient Plains of Rhea (Released 6 May 2008)
  Densely cratered plains cover the ancient surface of Saturn's moon Rhea.
  


• Dark Boundary (Released 7 May 2008)
  Saturn's semitransparent rings arc smoothly around the gas giant, abruptly disappearing where they pass through the planet's shadow.
  


• Moons that Pass in the Night (Released 8 May 2008)
  Two of Saturn's ring moons draw close momentarily, before the inner of the pair moves off alone.
  


• South on Rhea (Released 9 May 2008)
  The Cassini spacecraft surveys the south polar region of icy Rhea.

All of the Cassini images are archived here.