🪐 Mechanical Orrery — 2D Kepler Orbits and Equal-Area Law

2D companion of the mechanical orrery: Kepler-equation orbits for six planets and an adjustable test body, equal-area wedges, a log-log period-radius graph and an independent leapfrog check of Newtonian gravity.

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