The Three-Body Problem: How a Simple Question Broke Newtonian Physics
Three masses, known positions, known momenta — predict the future. It sounds trivial, but this question defeated Isaac Newton, dominated a royal mathematics competition in 1889, and ultimately exposed a hard limit on what science can ever know. This post traces how Henri Poincaré won King Oscar II's prize not by solving the three-body problem but by proving it analytically unsolvable, discovering saddle points and extreme sensitivity to initial conditions along the way. The result was a new kind of physics — chaos theory — and the unsettling insight that a fully deterministic universe can still be fundamentally unpredictable.
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