How did the Ptolemaic model explain the apparent retrograde motion of the planets?

a. The planets sometimes stopped moving and then reversed to move backward along their circular orbits.

b. The model showed that apparent retrograde motion occurs as Earth passes by another planet in its orbit of the Sun.

c. The planets moved along small circles that moved on larger circles around the Earth.

d. The planets resided on giant spheres that sometimes turned clockwise and sometimes turned counterclockwise.How did the Ptolemaic model explain the apparent retrograde motion of the planets?a. is what he saw, so he just wanted an explanation for that.

b. is what is really happening today.

c. is what Ptolemy was inventing to explain the rare behaviour.

d. a scientist wouldn't wrote that down...How did the Ptolemaic model explain the apparent retrograde motion of the planets?I agree with her.



Epicycles.



You really need to crack your text and pay attention. This isn't cementing anything in memory.