Made with gold wire and beads that resemble the eight planets, this solar system is mounted on a clock mechanism within a wooden block. The mechanism is accessed from the bottom and takes one AA battery. This item and others like it are for sale at My Store.

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How the bodies sit:

Sun - Center
Second Hand - Mercury (visibly moves)
Minute Hand - Venus, Earth (rotates completely over an hour)
Hour Hand - Mars, Jupiter, Saturn (rotates completely over 12 hours) 
Stationary - Uranus, Neptune

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As I have gone with current scientific knowledge, Pluto is not included.