|NASA's Cassini orbiter has been circling Saturn for much of its four year mission. For most of this time the 22 foot-long, 4,700 pound (2,100kg) unmanned spacecraft has returned remarkable photographs, all of them the most detailed ever seen of this remarkable world. Before visiting Saturn, Cassini passed by both Venus and Jupiter, returning to earth tens of thousands of spectacular new photos.
Cassini has sent back photos of Saturn's mysterious moon, Enceladus, a world measuring only a little over 30 miles in diameter, and one wracked by constant impacts and internal stresses, leaving it's surface scarred and fractured. At times Cassini sped by the moon's surface at heights of as little as fifteen miles.
Boston.com has more stunning photographs of this tiny moon, each of them highly detailed and more fascinating than the last.