Mechanical TellurionMechanical Tellurion Assemble me. Spin the Earth! Ugears is proud to present the Mechanical Tellurion, an accurate wooden model representation of our corner of the universe. A tellurion is an ingenious mechanism that depicts the cosmic dance between the Sun, Earth, and Moon. The causes of day and night, the phases of the Moon, and the changing seasons are seen and understood according to the movements of this 3D puzzle. Turn the handle to set the