400
Nicholas Copernicus, a polish priest in astronomy, published "On the Revolutions of the Celestial Orbs" in 1543. The book argued that the motions of the planets can be better explained by assuming that Earth was a planet that orbited the sun. State 2 reasons that most people rejected this claim.
1. The sun appeared to move in the sky everyday.
2. People thought that Earth was in the center of the universe .