9781422283714

Saturn is the most distant planet that can be seen with the naked eye. No one knew there were any more distant planets until 1781, when Uranus was discovered. The giant planets are very different kinds of worlds from the tiny Earth and its even smaller neighbors. The Earth and the near planets are solid bodies made up mainly of rock. Jupiter and Saturn are made up mainly of gas. They have no solid sur face at all. The giant planets are different from Earth in yet another way. They are like miniature

solar systems with many satellites , or moons , circling around them. Saturn alone has more than 50 moons.

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