This is an infrared image of Titan from 4 different sides showing places which are hot. 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. Titan 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 thick atmosphere .
The picture is showing places below the clouds of Titan which are hot. Finding places which are hot is the only way to tell what is happening near the surface . Because of its atmosphere, Titan may have an environment able to support life . As one of the largest moons, with an unusual composition , the history of Titan is unlike any other. This is an infrared image of Titan from 4 different sides showing places which are hot.