"Adorned with thousands of beautiful ringlets, Saturn is unique among the planets. All four gas giant planets have rings -- made of chunks of ice and rock -- but none are as spectacular or as complicated as Saturn's. Like the other gas giants, Saturn is mostly a massive ball of hydrogen and helium. Ten important facts related to Saturn are: If the sun were as tall as a typical front door, the Earth would be the size of a nickel and Saturn would be about as big as a basketball; Saturn orbits our sun, a star. Saturn is the sixth planet from the sun at a distance of about 1.4 billion km (886 million miles) or 9.5 AU; One day on Saturn takes 10.7 hours (the time it takes for Saturn to rotate or spin once); Saturn makes a complete orbit around the sun (a year in Saturnian time) in 29 Earth years; Saturn is a gas-giant planet and does not have a solid surface; Saturn's atmosphere is made up mostly of hydrogen (H2) and helium (He); Saturn has 53 known moons with an additional 9 moons awaiting confirmation of their discovery; Saturn has the most spectacular ring system of all our solar system's planets. It is made up of seven rings with several gaps and divisions between them; Five missions have been sent to Saturn; Since 2004, Cassini|Cassini has been exploring Saturn, its moons and rings; Saturn cannot support life as we know it. However, some of Saturn's moons have conditions that might support life; When Galileo Galilei looked at Saturn through a telescope in the 1600s, he noticed strange objects on each side of the planet and drew in his notes a triple-bodied planet system and then later a planet with arms or handles. The handles turned out to be the rings of Saturn."