Titan Titan Titan was first discovered by Huygens in 1655. Titan is the 4th farthest moon from Saturn, with a standoff distance of 1,221,850 km. It is one of the largest moons in the solar system, much larger than the Earth's moon. The only larger moon is Ganymede .
Titan is the only moon known to have a substantial atmosphere.
In the picture to the left is an image of Titan from 4 different views, showing regions near the clouds which are hot. This picture is taken in infrared wavelengths, which detect places which are hot. This method of observing a moon is one of the only tools with which to penetrate the thick atmosphere of Titan which obscures the surface . Because of the presence of an atmosphere, Titan may produce an environment able to sustain life . As one of the largest moons, with an unusual composition , the evolution of Titan is unlike any other.