On Friday, September 15th, the nearly twenty-year-long Cassini-Huygens mission came to an end when the probe sent into space by NASA and the European Space Agency (ESA) completed a "death dive" into Saturn's atmosphere. Over the past thirteen years, Cassini has captured spectacular images and revealed previously unknown facts about the planet along with its rings and moons. BBC News has created this fascinating multimedia essay about the history and significance of the Cassini mission. Here, visitors can learn more about Dr. Linda Spilker, who has worked on the Cassini mission since 1988; learn about how NASA and ESA came to collaborate on this project; check out a map of Cassini's travels; view images from the probe (including an image of Saturn's moon Titan and an image of the hurricanes discovered at the planet's pole); and learn about what missions may come next.