Before digital ephemerides, gentlemen natural philosophers bought tabletop planetariums driven by clockwork. Gear trains encoded Kepler’s ratios in brass — each cog a physical integral.
This model is heliocentric: the Sun sits at the hub while arms carry worlds in a shared ecliptic plane. Display geometry differs from Ptolemaic orreries, but the angular velocity ratios are the same honest physics.
Watch Mercury lap Earth roughly four times per “year” — that ratio is the orbital period, encoded as ω. No integrators needed; multiply elapsed time by angular speed and rotate.
We generate wood grain, brushed brass, and star fields on HTML Canvas instead of fetching assets — fewer draw-call surprises, zero network flakes, and you can re-roll noise seeds without leaving the file.
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