Here's a breakdown:

* Geocentric System: This model places the Earth at the center of the universe, with all other celestial bodies revolving around it. This was the prevailing view for centuries, with notable proponents like Ptolemy.

* Heliocentric System: This model places the Sun at the center of the solar system, with the Earth and other planets revolving around it. This model, championed by Nicolaus Copernicus, is the one we accept as accurate today.

So, while both models describe the arrangement of celestial bodies, they have drastically different perspectives on what lies at the center.