Titan, Saturn's largest moon, is a cold world with a dense nitrogen-rich atmosphere and complex organic chemistry on its surface. Methane and ethane cycle through clouds, rain, rivers and lakes, driving erosion and sediment transport under frigid conditions of scientific interest. Exploration has revealed dunes, possible cryovolcanic features, and a persistent photochemical haze that complicates remote observation. Robotic probes and proposed missions focus on habitability, prebiotic chemistry, and surface-atmosphere processes to inform models of planetary evolution and astrobiology.
