11. How long does it take planets to orbit the Sun? (A K2S Question)

From The Space Library

The closer the planet is to the Sun, the faster it has to move to keep from spiraling into the Sun. The Earth takes one year. Mercury and Venus are closer to the Sun, so they take less than one year. All other planets take longer than one year.

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Answer provided by Ed Frederick, Ph.D.

Question and Answer extracted from the book Kids to Space - by Lonnie Schorer

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