All 8 planets with accurate relative orbital periods — click any planet for details
Click a planet to see details
About: An orrery is a mechanical model of the solar system. Orbital periods shown here are correct relative to Earth's 365-day year. Kepler's third law states T² ∝ a³, so planets farther from the Sun orbit far more slowly — Neptune takes 165 Earth years per orbit. Orbital resonances (e.g., Jupiter's gravitational influence) sculpt the asteroid belt and create Kirkwood gaps.