Definition
An orrery is a mechanical model of the solar system illustrating the relative positions and motions of the planets and moons in a heliocentric system. πͺ Think of it as a mini-solar system on your desk. It's not just a static display; the planets actually move! It helps visualize the vastness and order of space. Imagine a complex clockwork mechanism showing planetary orbits. Itβs like a teaching tool and a beautiful piece of art. β¨