Saturn's largest moon, Titan, is discovered by Christiaan Huygens.

March 25, 1655

Saturn's largest moon, Titan, is discovered by Christiaan Huygens.

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.

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