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2D Orrery: Kepler's Third Law Explorer

Interactive 2D top-down orrery: watch six planets sweep concentric rings around the Sun at speeds derived from Kepler's third law (T² ∝ a³), toggle each planet's visibility, and read live elapsed time, angle and orbital period.

Space & Astronomy2DEasy60 FPS📱 Mobile-adapted⇄ 3D version

This flat, top-down companion to the 3D mechanical orrery draws the Sun and six planets on concentric rings, each sweeping its orbit at a speed computed live from Kepler's third law (T² ∝ a³) rather than a fixed lookup table, so you can toggle planets on or off, click one to watch its live angle and period, and speed up or slow down simulated time to compare how dramatically period grows with orbital radius.

⚙ Under the hood

A top-down 2D orrery where six planets sweep concentric rings around the Sun at speeds computed live from Kepler's third law, with visibility toggles and a live angle/period readout.

Orrery ModelKepler's LawsPlanetary MotionOrbital Dynamics

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