Final answer:
The critical error in the geocentric model is placing Earth at the center instead of the Sun.
Explanation:
The critical error seen in the geocentric model of the solar system is that it incorrectly places the Earth at the center with the Sun orbiting around it, instead of having the Sun at the center with planets orbiting around it. This led to difficulties in explaining retrograde motion observed in planets like Mars. The geocentric model was eventually replaced by the heliocentric model proposed by Copernicus, which provided a more accurate explanation of celestial motions.
Learn more about Geocentric and Heliocentric Models of the Solar System here:
https://brainly.com/question/14397545
