Titan's Earthlike weather runs on a 29-year Saturnian year, with 7.5-year seasons
Titan, Saturn’s largest moon, hosts Earthlike weather—clouds, methane rain, rivers and shifting dunes—where each season lasts about 7.5 Earth years because Saturn takes roughly 29 years to orbit the Sun; Cassini data reveal a thick atmosphere, a methane/ethane cycle driving lakes that fill and dry with the seasons, shifting winds and dunes, and a subsurface water-ammonia ocean, raising questions about methane's ongoing presence.