The Cassini-Huygens spacecraft returned this image of Saturn on Sunday, May 16, 2004, taken with its imaging science subsystem narrow-angle camera. Enceladus, one of Saturn’s 31 known moons, appears near the south pole at the bottom of the image. After a seven-year, 2.2 billion-mile journey, the Cassini spacecraft will fire its engine Wednesday night, June 30, 2004, to slow down, allowing itself to be captured by Saturn’s gravity. (AP Photo/NASA/JPL/Space Science Institute)