Animation depicting the NASA drone/probe called Dragonfly. Scheduled for launch in 2028, this probe will visit Titan, the largest moon of Saturn and the only natural satellite known with bodies of liquid on its surface. Titan's lakes and seas are composed of hydrocarbons like methane and ethane. Dragonfly, upon arrival in 2034, will search for signs of prebiotic chemical processes common on both Titan and the early Earth before life developed.