Question:Why were the theories of the Copernicus and Galileo models considered controversial at the time?
Their theories contradicted the teachings of the major religions, particularly the Catholic Church.
The Church had a lot of power over people in those days and was strongly opposed to any ideas that contradicted the Bible.
People were executed for blasphemy or heresy if they made statements contradictory to the Church's views.
Copernicus's theory was not even published until after his death, because of this fear of repercussions.