Titan (IMAGE) NASA/Goddard Space Flight Center Caption Titan, the largest of Saturn's moons, is about to slip behind the planet in this portrait captured by the Cassini spacecraft in 2008. Credit NASA's Jet Propulsion Laboratory Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.