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

Question

Responses

The planets had epicycles.
The planets had epicycles.

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.

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.

The geocentric model struggled with explaining the variations in the apparent brightness and phases of Mercury and Venus, as well as the apparent retrograde motion of Mars and Jupiter.