Moon of Saturn
Diameter: 5150 km
Distance: 1221850 km (mean)
Period: 15.945 days
Eccentricity: 0.029
Inclination: 1.63°
Magnitude: 8.4

Discovered in 1655 by astronomer Huygens, Titan is the biggest of Saturn's moons and the second largest moon in our solar system. It is a cold world enclosed by a thick, hazy atmosphere impenetrable by telescopes and cameras. It is the only natural satellite known to have a dense atmosphere largely composed of nitrogen (98.4%). In 2005, Cassini's Huygens probe landed on the surface of Titan, just off the easternmost tip of a bright region now called Adiri. Huygens photographed a dark plain covered in small rocks and pebbles, which are composed of water ice. Although hostile to life Titan is similar to Earth. It has a solid surface, a dense atmosphere, wind, rain, ice as well as rivers and lakes. Rivers and lakes are filled with liquid methan. Its surface is largely rocky with water ice at a temperature of -180 degrees C, thus colder than dry ice. Inspite of the hazardous environment astronomers assume presence of microbial extraterrestrial life. NASA scientists have concluded that at least one of the large lakes observed on Saturn's moon Titan contains liquid hydrocarbons, and have positively identified the presence of ethane. This makes Titan the only body in our solar system beyond Earth known to have liquid on its surface.