Saturn,
the second most massive planet, and the most distant planet known to the
ancients, is one of the most beautiful sites in the Solar System, as witnessed
by the adjacent image. The most striking feature of Saturn is the spectacular
ring system. Although this feature is
no longer unique, since we now know that all the
Gas Giant planets have rings, the rings of Saturn are much more elaborate than
those of any of the other planets. Saturn shares many features with its even
larger Gas Giant neighbor Jupiter, but has various unique features in its own
right.