3body
A free physics simulation — play it in your browser, no install. The three-body problem, live: three chaotic suns, tiny asteroids, and a ghost universe that makes the butterfly effect visible. Single HTML file, zero dependencies.
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Controls: Click the canvas to launch an asteroid from that point toward the system
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Open the live demo Source on GitHubFrom the README
**A self-contained, zero-dependency simulation of the three-body problem that makes chaos visible.**
Three suns of nearly equal mass locked in a gravitational dance. Every now and then a tiny asteroid — one millionth of a stellar mass — drifts through the system. That's the flap of a butterfly's wings. And you get to watch it tear the future apart.
▶ Live demo — one click, no install, no build step.
At first the ghosts hide perfectly behind the real stars. Then an asteroid passes through — nudging each sun by a millionth of its mass — and the two universes begin to peel apart.
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