Answer:
Heliocentric, Sun
Explanation:
Ptolemy believed in the Geocentric theory, the theory that everything in the universe revolved around the Earth (the root Geo is indicative of Earth). Copernicus believed in the theory of Heliocentrism, the theory that everything revolved around the Sun (the root Helio is indicative of Sun).
*neither are accurate based on modern scientific knowledge, however Copernicus's was closest to being factual*
