Titan: A Moon with Lakes of Methane

Titan is Saturn’s largest moon and the second-largest in the solar system.
It’s bigger than the planet Mercury and has a thick, hazy atmosphere.
Titan’s atmosphere is mostly nitrogen, with methane and other hydrocarbons.
It’s the only moon known to have stable liquid lakes and seas on its surface.
These lakes are filled not with water, but liquid methane and ethane.
Titan has a methane cycle similar to Earth’s water cycle, with rain, rivers, and clouds.
The largest sea, Kraken Mare, is bigger than all of Earth’s Great Lakes combined.
Titan’s surface hides an underground ocean of liquid water mixed with ammonia.
NASA’s Cassini spacecraft and the Huygens probe provided the first close-up data of Titan.