Liquid hydrocarbons on Titan, computer artwork. Lake of liquid ethane on Titan, the largest moon of Saturn. Spacecraft surveys of Titans north polar region have found evidence for hydrocarbon seas, lakes and rivers. The probes found low radar reflectivity areas, likely caused by bodies of liquid ethane, methane and dissolved nitrogen. Surface temperatures on Titan can reach as low as minus 183 degrees Celsius. Saturn is in the sky at left, with the Sun at right.
