Saturn is the sixth planet from the sun and the second largest planet in the solar system. It is made up of hydrogen gas, with a liquid hydrogen middle layer and a rocky core. Saturn has over 60 moons, including Titan, which is the second largest moon in the solar system. Saturn also has a prominent ring system made of ice particles and dust. The Cassini-Huygens mission orbited Saturn from 2004 to 2017 and made many discoveries about the planet and its moons.