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.
Reactions to USSR using military force to make Eastern Europe communist ... was the only E. European nation that was communist without being a satellite.
