Orbiter, Non-Illuminated

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.

• The arm is 15″ long
• Sun is 6″ in diameter
• Earth is 4″ in diameter
• the moon is 1″ in diameter.

Includes Study Guide. Grades 3+, Ages 8+.