Ptolemy's model of the solar system explained the apparent changes in speed and direction of the planets by stating that the planets spun on epicycles. In this geocentric model, planets moved in small circles (epicycles) while traveling along larger circular orbits (deferents) around the Earth, which helped to account for the irregular movements of the planets observed from Earth.
How did Ptolemy's model of the solar system explain the apparent changes in speed and direction of the planets?(1 point)
Responses
The planets were attached to crystalline surfaces.
The planets were attached to crystalline surfaces.
The planets had a significant stellar parallax.
The planets had a significant stellar parallax.
The planets were fixed to nested spheres.
The planets were fixed to nested spheres.
The planets spun on epicycles.
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