Responses
The planets were attached to crystalline surfaces.
The planets were attached to crystalline surfaces.
The planets spun on epicycles.
The planets spun on epicycles.
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.
1 answer
The correct response is:
The planets spun on epicycles.
Ptolemy's model of the solar system included the concept of epicycles, which were small circular orbits that planets would follow while simultaneously moving along larger circular orbits around the Earth. This explanation helped account for the apparent changes in speed and direction of the planets observed from Earth.
12 answers
11 answers
1 answer
4 answers