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. This concept involved smaller circular orbits (epicycles) that the planets followed while simultaneously orbiting on larger circular paths (deferents) around the Earth, allowing for the observed retrograde motion and variations in speed.
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 were fixed to nested spheres.
The planets were fixed to nested spheres.
The planets had a significant stellar parallax.
The planets had a significant stellar parallax.
The planets spun on epicycles.
The planets spun on epicycles.
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