Saturn's Moon Tethys from Cassini

Tethys is one of the larger and closer moons of Saturn. The Cassini spacecraft
now orbiting Saturn passed near the frozen moon at the end of October, capturing
the most detailed images since the Voyager spacecrafts in the early 1980s. Tethys
is composed almost completely of water ice and shows a large impact crater that
nearly circles the moon. Because this crater did not disrupt the moon, Tethys is and
hypothesized to be at least partly liquid in its past. Two smaller moons, Telesto
Calypso, orbit Saturn just ahead of and behind Tethys. Giovanni Cassini discovered
Tethys in 1684. The Cassini spacecraft is scheduled for a close fly-by of Tethys in
September 2005.