✔ See planetary motion in action: The moving display demonstrates how the Moon orbits Earth while Earth travels around the Sun. With all 9 planets, including Pluto, and 28 moons represented, it makes the mechanics of the solar system visible.

✔ Detailed gears reveal how it works: An exposed mechanism of solid brass gears powers the planetary display. Mercury completes a model orbit in about 4 seconds, while Pluto takes about 4 hours, offering a clear demonstration of their different orbital periods.

✔ Crafted from brass, stone, and oak: The Sun, planets, and moons are made from semi-precious stone spheres. A twelve-sided oak barrel houses the gears and rests on 12 solid brass feet, with an engraved brass calendar and zodiac ring and a detachable brass armillary half-sphere above.

Model type: Tower orrery

Materials: Brass, semi-precious stone, and oak

Dimensions: Height: 7.01 in; width: 5 in; depth: 5 in

Celestial bodies displayed: 9 planets, including Pluto, and 28 moons