tilted spheres

4

Skeleton clock with orrery. Orrery driven by an 8-day half hour striking clock. All bearings in clock are miniature ball bearings. Stainless steel screws. Lacquered brass parts. Maintaining power. Skeleton clock uses silvered brass ring dial with Roman numerals in indicate hours. Orrery also uses silvered brass ring dial with months. Mounted on round wooden base and covered with glass dome.

The orrery of this clock is driven by an 8-day spring driven movement using a fusee and maintaining power. A passing strike is rung on the half hour. All of the clock bearings and some in the orrery are made of miniature ball bearings. Stainless steel screws are used throughout the movement. The sun at the center of the orrery shows the Tropical year and the signs of the Zodiac, rotating once every 365.2423 days. Mercury, the planet closest to the Sun, rotates once in 88.01 days. the next planet, Venus makes one revolution in 224.76 days. The Earth sphere is tilted 23.2 degrees and always points to the pole star. The moon sphere, inclined a 5 degrees, rotates once in 29.53023 days.