The geocentric model could not explain which of the following observations made by early astronomers? Select the two correct answers.(1 point)

Question

Responses

Mercury and Venus changed in appearance throughout the year.
Mercury and Venus changed in appearance throughout the year.

The stars appeared to move.
The stars appeared to move.

Mars and Jupiter appeared to move backwards for some period of time.
Mars and Jupiter appeared to move backwards for some period of time.

The planets had epicycles.

Answer 1

The two correct answers that the geocentric model could not explain are:

1. Mercury and Venus changed in appearance throughout the year.
2. Mars and Jupiter appeared to move backwards for some period of time.

The geocentric model struggled to account for the observed changes in brightness and phases of Mercury and Venus, as well as the retrograde motion of Mars and Jupiter.