An orrery is what you call a mechanical model of all or part of the solar system that shows the relative rotations of the planets and the sun. Many of these old-fashioned celestial models are ...

Jacob & Co Astronomia Black Solar Zodiac Adds Another Spin On A Classic: Rotating solar system background builds on the already complex original.

Did you ever build one of those scale models of the solar system as a kid? You know, where you walk around a football field setting down balls of different sizes, attempting to gain some ...