Answer:
Heliocentric theory
Step-by-step explanation:
Back then in the 16 century, the Catholic Church taught that the Earth was in the center of the universe. Then, Copernicus did some astronomy and figured out that the Earth revolved around the Sun. The Church disliked the idea since it went against "God's ideas". They started arresting astronomers like Galileo to suppress the Heliocentric theory. Then, people started accepting the Heliocentric theory and realized they are not the center of the universe.