Sun, Earth and Moon manually revolve around one another on this gear-driven model. Effectively demonstrates daylight, night, seasons, and phases of Moon. Arm is 375mm, Sun is 150mm in diameter. Includes study guide.
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Sun, Earth and Moon manually revolve around one another on this gear-driven model. Effectively demonstrates daylight, night, seasons, and phases of Moon. Arm is 375mm, Sun is 150mm in diameter. Includes study guide.
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