Saturn

Saturn is the sixth planet from the Sun and the second-largest in the Solar System, after Jupiter. It is a gas giant with an average radius of about nine and a half times that of Earth. It only has one-eighth the average density of Earth; however, with its larger volume, Saturn is over 95 times more massive. It was named after the Roman God Saturn (the Greek mythology equivalent is Kronos, father of Zeus). Its symbol is a stylized representation of God's sikhle (Unicode: ♄).

The planet's most famous feature is its prominent ring system, which is composed mostly of ice particles, with a smaller amount of rocky debris and dust.

Physical Characteristics
Saturn is a gas giant composed predominantly of hydrogen and helium. It lacks a definite surface, though it may have a solid core. Saturn's rotation causes it to have the shape of an oblate spheroid; that is, it is flattened at the poles at its equator. Jupiter, Uranus, and Neptune, the other giant planets in the Solar System, are also oblate but to a lesser extent.

Saturn is the only planet of the Solar System that is less dense than water - about 30% less. Although Saturn's core is considerably denser than water, the density of the planet is 690 kg/m3. Jupiter has 318 times Earth's mass, and Saturn is 95 times Earth's mass. Together, Jupiter and Saturn hold 92% of the total planetary mass in the Solar System. In terms of area and volume, the surface area of Saturn is 4.27×1010 km2 or 83 Earths. While, the volume of Saturn is 8.2713×1014 km3 or 7559 Earths.

Moons
Saturn has 53 known moons, 53 of which have formal names. In addition, there is evidence of dozens to hundreds of moonlets with diameters of 40–500 meters in Saturn's rings, which are not considered to be true moons. Titan, the largest moon, comprises more than 90% of the mass in orbit around Saturn, including the rings. Saturn's second-largest moon, Rhea, may have a tenuous ring system of its own, along with a tenuous atmosphere. The known moons include Titan, Enceladus, Hyperion, Dione, Tethys, Mimas, Phoebe.