ESA's Huygens probe landed on Saturn's moon Titan in 2005.
The landing occurred on January 14, 2005, after the probe separated from NASA's Cassini spacecraft. Huygens entered Titan's atmosphere, used a parachute system to slow its descent, and transmitted data during the fall and after touchdown.
Its instruments measured atmospheric properties, wind, and the chemical environment. Cameras also revealed a landscape shaped by flowing liquids, although Titan's surface rivers and lakes contain methane and ethane rather than Earth's water.
Huygens made the first landing in the outer Solar System and the first landing on a moon other than Earth's Moon. The mission's result helped establish Titan as a complex world with an active weather cycle.