🪐 Brass Orrery: Gear Ratios vs Kepler's True Sky - 2D Plan View

A top-down plan of a brass orrery: draw the tooth-count gear train for each planet, watch uniform brass circles drift away from Kepler's true ellipses, and read the equation-of-centre error live.

2D · HTML5 Canvas 2D · 60 FPS target · runs fully client-side, no install