Experts at Harvard's Collection of Historical Scientific Instruments are using the Grand Orrery, a centuries-old mechanical model of the solar system, to study the Revolutionary War. Morison ...

We aren’t sure how accurate you can get with LEGO, but a building block orrery looks cool, if nothing else. [Marian42] saw one done a few years ago and decided to build a version with a ...

[Illusionmanager] continues the orrery tradition but uses a different approach: he built a beautiful ceiling-mounted model of our Solar System without a gearing system. The mechanism that makes ...