SATURN is the sixth planet from the sun. Saturn has a lot of gas around it. The gas is made of hydrogen and helium. It puts out more heat than it receives from the sun. Saturn's magnetic field is 1,000 times stronger than Earth's. Galileo looked at Saturn in 1960. He thought it was a triple planet. In 1655, Datch, an astronomer, discovered that Saturn has a solid ring around it. Later, scientists discovered there to be seven different rings.