The sixth planet from the Sun and the second-largest in the Solar System was the most distant of known planets to ancient civilizations. The gas giant appears to us in a pale yellow color because of its upper atmosphere contains ammonia crystals. It is made up of 94% hydrogen, 6% helium and small amounts of methane and ammonia. Hydrogen and helium are what most stars are made of. It is thought that there might be a molten, rocky core about the size of Earth deep within Saturn. Its ring system, extending hundreds of thousands of kilometers from the planet, is the most complex one in our Solar System. First observed in 1610, by the Italian astronomer Galileo Galilei. What he saw through his telescope he described as separate spheres. Saturn appeared to Galileo to be triple-bodied. In 1659, the Dutch astronomer Christiaan Huygens, using a more advanced telescope suggested that Saturn was surrounded by a thin, flat ring. He had the resolution to realize that the Galileo's 'separate spheres' on the sides of Sat
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