European Space Agency
The agency's site details the Huygens mission to Titan and includes up-to-date information on discoveries by the Cassini spacecraft.
Space Science Institute
Hub of the imaging team, this site includes a diary of the discoveries Cassini has made.
University of Arizona Lunar and Planetary Lab
Click on "Huygens Landing" to link to information and images about the descent and landing of the Huygens probe on Titan.
Find links to details about the 56 known moons
Beatty, J. Kelly, and others. The New Solar System, 4th ed. Sky Publishing Corporation, 1999.
Drake, Stillman. Galileo at Work: His Scientific Biography. University of Chicago Press, 1978.
Lorenz, Ralph, and Jacqueline Mitton.Lifting Titan's Veil: Exploring the Giant Moon of Saturn. Cambridge University Press, 2002.
MacDonald, Lesley J. "Ring World." National Geographic Explorer! (March 2005), 10-15.
Beatty, J. Kelly. Exploring the Solar System: Other Worlds. National Geographic Books, 2001.
Sawyer, Kathy. "A Mars Never Dreamed Of." National Geographic (February 2001), 30-51.
Emory, Jerry. "Saturn: Lord of the Rings." National Geographic World (April 1996), 28-32.Smith, Bradford A. "Voyage of the Century." National Geographic (August 1990), 48-65.
Gore, Rick. "The Planets: Between Fire and Ice." National Geographic (January 1985), 4-51.
Gore, Rick. "Voyager 1 at Saturn: Riddles of the Rings." National Geographic (July 1981), 2-31.