Why was Nicolaus Copernicus's theory that the earth orbits the sun so shocking to the people living in the 1500's?

His views went against traditional beliefs, including those of the Roman Catholic Church

Explanation: The theory by Nicolaus Copernicus that the earth orbits around the sun is a heliocentric model that is still valid today, while the thinking of the 1500's was that the sun and other planets circle around the earth, which is a geocentric model. The geocentric model was the official position of the Church that shaped people's thinking and had a great influence on believers. That's why this heliocentric model was a shock, and it was considered a heresy.