Sun-Earth-Moon Orrery Model: Educational Demonstrator for Planetary Motion - Teaches Day/Night, Moon Phases & Eclipses

• * This instrument is a special teaching instrument that intuitively reflects the law of relative motion between the sun, the earth, and the moon.
• * It is composed of three small balls representing the sun, the earth and the moon, and has a mechanical linkage device to demonstrate the relationship between the three balls and some astronomical phenomena arising therefrom.
• * The earth can observe the seven states, the four oceans, the Arctic and Arctic circles, the Tropic of Cancer, the equator and the international date line
• * The average height of the center of the moon is equal to the height of the center of the earth.
• * We attach great importance to customer experience, so you can us if you have any questions, and we will get back to you within 24 hours!

Name: Three-ball instrument for popular science teaching Function: Simulate sun and moon operation Size: 38×25CM/14.96*9.84 in Rotation method: manual Product material: ABS engineering plastic Product light source: environmentally friendly and durable LED energy-saving lamps Structure Four Seasons Plate: Represents the names, sequence and dates of the four seasons and the twenty-four solar terms. Operating handle: connect with the central tube to start the push handle to increase the rotation of the component for demonstration. Four seasons disc indicating arrow: indicates the seasons and solar terms on the earth when the earth revolves. Moon phase plate: Use it to indicate the position of the moon phase and the day and night on the earth.