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.

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 stars appeared to move.
The stars appeared to move.

The planets had epicycles.

Answer 1

The two correct answers regarding the observations 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.

These observations challenged the geocentric model, which struggled to adequately account for the retrograde motion of planets and the varying appearances of Mercury and Venus as inner planets.