planet Saturn, Pan and Atlas, released by NASA

High resolution images of the moons of the planet Saturn, Pan and Atlas, released by NASA December 6, 2007, reveal distinctive "flying saucer" shapes created by prominent equatorial ridges not seen on the other small moons of Saturn. The images were acquired with the Cassini spacecraft narrow-angle camera between 2005 and 2007. Pan is 33 kilometers (20.5 miles) across at its equator and 21 kilometers (13 miles) across at its poles; Atlas is 39 kilometers (24 miles) across at its equator and 18 kilometers (11 miles) across at its poles