An artist's concept shows the Dragonfly drone above Titan, the largest moon of Saturn. NASA recently approved the mission for launch in 2020. It will land in a dune field near Titan's equator. It will fly to a new location each Titan day (about 16 Earth days), then land and analyze rocks on the surface, listen for quakes, and measure Titan's weather. Titan has a dense, cold atmosphere, along with clouds and rains of methane and ethane. [JHUAPL]