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GeoGebraGeoGebra Classroom

Epicyclic Movement of Inferior Planets

Epicyclic movement of the inferior planets (Mercury and Venus). This is a simplification of Ptolomey's geocentric model (ignores eccentricity of the orbits). Actual orbital periods and semi-major axis values are used in this model. Use the check boxes to turn on tracing of the geocentric orbits of the planets.