$279.00
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Klinger Scientific Orbiter Battery Made of superior quality polymers Sturdy structure and good stability. A smooth Gear-driven model. Manually movable moon. Shadow hemisphere to represent night. Includes a detailed instruction manual. How many days does it take the Earth to revolve around the Sun? The answer to this question and more are answered when using this gear-driven model representing the Sun, Moon and Earth and their relationships. Daylight, night, seasons, and phases of the Moon are all effectively demonstrated. Arm is 15″ long; Sun is 6″ in diameter; Earth is 4″ in diameter; moon is 1″ in diameter.
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$279.00