what would we see in the center of the Solar System? The answer took a while for astronomers to figure out, leading to a debate between what is known as the geocentric (Earth-centered) model and ...

with the ancient Greek scholar Ptolemy formalizing this "geocentric" model in 150 B.C. Then, in 1543, Nicolaus Copernicus described a heliocentric (sun-centered) model of the solar system ...