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Saturn is the sixth planet from the Sun and the second largest
planet in the Solar System, after Jupiter. Saturn, along with Jupiter, Uranus and Neptune, is classified as a gas giant. Together,
these four planets are sometimes referred to as the Jovian, meaning "Jupiter-like", planets.
Saturn is named after the Roman god Saturnus (that became the namesake ofSaturday), equated to the Greek Kronos (the Titan
father of Zeus) the Babylonian Ninurtaand to the Hindu Shani. Saturn's symbol represents the god's sickle (Unicode: ♄).
The planet Saturn is composed of hydrogen, with small proportions of helium and trace elements. The interior consists of a
small core of rock and ice, surrounded by a thick layer of metallic hydrogen and a gaseous outer layer. The outer atmosphere
is generally bland in appearance, although long-lived features can appear. Wind speeds on Saturn can reach 1,800 km/h, significantly
faster than those on Jupiter. Saturn has a planetarymagnetic field intermediate in strength between that of Earth and the
more powerful field around Jupiter.
Saturn has a prominent system of rings, consisting mostly of ice particles with a smaller amount of rocky debris and dust.
Sixty-one known moons orbit the planet, not counting hundreds of "moonlets" within the rings. Titan, Saturn's largest and
the Solar System's second largest moon (after Jupiter's Ganymede), is larger than the planet Mercury and is the only moon
in the Solar System to possess a significant atmosphere.
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