Copernicanism
Copernicanism refers to the model of the universe that places the Sun, rather than the Earth, at its center. This heliocentric model was famously articulated by Nicolaus Copernicus in his book "De revolutionibus orbium coelestium" (On the Revolutions of the Heavenly Spheres), published posthumously in 1543. Before Copernicus, the prevailing cosmological view was geocentric, largely based on the work of Ptolemy, which posited the Earth as stationary at the center of the universe with all celestial bodies revolving around it.
Copernicus's model suggested that the Earth rotated on its axis daily and orbited the Sun annually. This