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3D simulation

Kepler's Laws Orbit Simulator

Ellipses · orbital period · swept area · semi-major axis

Learning outcomeConnect orbit shape and orbital speed with Kepler’s three laws.
Interactive 3D model
Orbital period1.00 yr
Perihelion0.80 AU
Aphelion1.20 AU
Learning focus

Compare orbital period, perihelion, and aphelion while changing orbit size and eccentricity.

T² = a³ (when T is years and a is AU)