The Article of the day for October 12, 2017 is Saturn . Saturn is the sixth planet from the Sun and the second-largest in the Solar System, after Jupiter. Named after the Roman god of agriculture, it is a gas giant with an average radius about nine times that of Earth. Although it has only one-eighth the average density of Earth, it is over 95 times more massive. The planet probably has a core of iron–nickel and rock, surrounded by a deep layer of metallic hydrogen, an intermediate layer of liquid hydrogen and liquid helium, and a gaseous outer layer. Ammonia crystals give the upper atmosphere a pale yellow hue. Electrical current within the metallic hydrogen layer is thought to give rise to the planetary magnetic field. Wind speeds can reach 1,800 km/h (500 m/s), higher than on Jupiter, but not as high as on Neptune. A prominent ring system with nine continuous main rings and three smaller arcs is composed mostly of ice particles, with some rocky debris and dust. Saturn has ...
