Question

In Ptolemy's system the planets orbit the Earth and not the Sun. How did the system explain the retrograde motion of planets like Mars?

Answer 1

Answer:

Ptolemy took the help of the epicyclic model to explain the brightening and the dimming of the planets in order to explain  there motion.

Explanation:

• As planets orbits in a small circle called as the epicycles and that of the earth is a deferment to this and is due to the larger orbit called as the deferment and causes the plates to have a looping motion and is  

• As Ptolemy model of the solar system is a called as geocentric which means that the sun and the earth orbit the earth in a perfectly circular orbit and they, however, don't explain the backward or retrograde motion of the planets as that of mars