Rings Around Saturn                       1 2 3 4 5 6 7 8 9 Cassini Spacecraft Marks 3 Years at Ringed World Pan's Progress Saturn's little moon Pan sweeps through an opening in the rings, called the Encke Gap, in this natural color view. As the lemon-shaped moon orbits the planet, it always keeps its long axis pointed along a line toward Saturn. The moon is 26 kilometers (16 miles) across, the gap is 325 kilometers (200 miles) wide. + Full image and caption     Jet Propulsion Laboratory    California Institute of Technology   + Cassini to Saturn