Interactive Science
Simulators

All 8 planets orbiting the Sun with accurate relative periods. Zoom, pan, hover for planet facts, control simulation speed. Based on Kepler's laws of planetary motion.

Real-time N-body gravitational simulation — every body attracts every other simultaneously. Try the Figure-8 orbit, binary stars, or drop your own bodies and watch chaos unfold.

Fire neutrons into a uranium grid and watch chain reactions cascade. Adjust U-235 enrichment, insert control rods to regulate the reaction, observe criticality — just like a real reactor.