NASA's Cassini Mission to Saturn

Cassini launched in October 1997 with the European Space Agency's Huygens probe. The probe was equipped with six instruments to study Titan, Saturn's largest moon. It landed on Titan's surface on Jan. 14, 2005, and returned spectacular results.

Meanwhile, Cassini's 12 instruments returned a daily stream of data from Saturn's system from the time it arrived at Saturn in 2004 until the mission's end in September 2017.

Among the most important targets of the mission were the moons Titan and Enceladus, as well as some of Saturn’s other icy moons. Towards the end, Cassini made closer studies of the planet and its rings.

More: http://saturn.jpl.nasa.gov/mission/