Titan Titan was first discovered by Huygens in 1655. Titan is the 4th farthest moon away from Saturn. Titan is one of the largest moons in the solar system, much larger than the Earth's moon. Its size is similar to the distance across the United States. The only larger moon is Ganymede .
Titan is the only moon known to have a thick atmosphere .
Because of its atmosphere, Titan may have an environment able to support life . Titan has a unique composition and history . This is an image of Titan from 4 different sides showing places which are hot. All Rights Reserved.