NASA’s Cassini orbiter launched from Cape Canaveral in October 1997, and after a seven year journey, it reached Saturn in 2004. From its orbit around Saturn, Cassini launched the European Space Agency’s Huygens probe to the surface of Saturn’s moon, Titan, on Christmas Day. The battery-powered Huygens survived 72 minutes on the moon’s surface, sending back hundreds of pictures to NASA and helping scientists characterize the moon. To this day, Huygens’ is the only craft humans have ever landed in the outer solar system. In the 13 years since Cassini arrived at Saturn, it has helped scientists understand the planet and its 53 to 62 moons. Cassini found lakes on Titan in 2006, discovered never-before-seen rings around Saturn, and in 2017, in the orbiter’s final year of operation, transmitted evidence of possible life below the surface of Saturn’s moon, Enceladus. For Cassini’s final mission, in September 2017, NASA will plunge the orbiter into Saturn’s atmosphere.