21. Will Pluto and Neptune ever collide? (A K2S Question)

From The Space Library

No. Although Pluto sometimes gets closer to the Sun than Neptune, when it's close to the Sun it is high above Neptune's orbit, so it doesn't come very close. Also, Pluto and Neptune orbit in-synch: Pluto orbits the sun exactly twice for every three orbits of Neptune. This means that when Pluto comes close to Neptune's orbit, Neptune is always somewhere else in its orbit.

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Answer provided by Dr. John Spencer, Ph.D.

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

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