NASA has some amazing pictures of Saturn, taken from the Cassini satelite. The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency and the Italian Space Agency.
This picture was taken almost a month after the planet’s August 2009 equinox. Note the shadow cast on the planet by it’s rings. One pixel represents 156km.

This next pic shows Saturn’s small moon Pan, as it casts a short shadow on the planet’s rings – taken from a distance of approximately 908,000 km away. Image scale is 5 km per pixel.

See more here: http://saturn.jpl.nasa.gov/photos/