http://saturn.jpl.nasa.gov/home/index.cfm
http://saturn.jpl.nasa.gov/multimedia/p ... 41221b.pdf
The Huygens probe will land on the surface of Titan, which is the largest moon of Saturn, on Friday and it will relay back info about the surface and atmosphere for about 30minutes I believe before the equipment stops working. Titan resembles very closley the early earth, so we can learn a lot about how we came to be on our earth. I'm also holding out a sliver of hope that there will be some form of mircoscopic life on the surface. The atmosphere is made up of Nitrogen, just like the Earths, and the surface is thought to contain many liquids, however, there is no liquid water because it's only 95 kelvin on the surface, which is really cold.