Saturn's moon Titan is the largest moon of the planet Saturn and the second-largest moon in the solar system. It has a thick atmosphere, primarily composed of nitrogen, with clouds and a weather system similar to Earth. Titan's surface features lakes and rivers of liquid methane and ethane, making it unique among celestial bodies. The temperature on Titan is extremely cold, averaging around -290 degrees Fahrenheit (-179 degrees Celsius). Despite these harsh conditions, scientists are fascinated by Titan because its complex chemistry may provide insights into the origins of life. Future missions may explore its surface and atmosphere further.