Although the Ptolemaic model was ultimately replaced by the Copernican model, the latter was not free of deficiency. Which of the following best describes this deficiency? Group of answer choices

The Copernican model retained epicycles and the notion of uniform circular motion.

Copernicus was able to explain and detect stellar parallax.

The Copernican model was much more accurate than the Ptolemaic model but was more complicated. The Copernican model did away with the need for epicycles.

Copernicus rejected the notion of uniform circular motion.

The Copernican model required significantly fewer epicycles than the Ptolemaic system because it moved the Sun to the center..

The Copernican model retained epicycles and the notion of uniform circular motion.

Explanation:

Copernican model explained that contrary to the view that the Earth is the center of the universe/solar system, it is rather the Sun which is at the center of the solar system and the universe at large. This is termed as heliocentric system. With this explanation, the Earth is just another planet orbiting round the sun in a circular motion, while the moon orbits the Earth.

However, some of the deficiency of Copernican model are:

1. It failed to question or see the flaw in the assumption of uniform circular motion of planetary bodies. He explained that the planets still moves in uniform circular motion. However, the orbits of the planetary bodies are not circle but rather ellipses.

2. Through his model, he believed that the Sun is at the center of the universe and is at rest mode which does not move like the other planets. However, this assertion of his model was wrong, as later discovery shows that, the solar system is constantly moving around the center of the Milky way galaxy at an average speed of about 828,000km/hrhr.