Why did the geocentric model place Earth at the center of planetary motion?

The geocentric model placed Earth at the center of planetary motion primarily due to the limitations of ancient physics and the reliance on sensory perception. Philosophers like Aristotle argued that a moving or rotating Earth contradicted common sense, as humans do not perceive such motion in their daily lives. Furthermore, early physics lacked the concept of inertia; it was believed that terrestrial motion required the constant application of force to prevent it from grinding to a halt.1

From an astronomical perspective, the geocentric model was driven by the "natural" expectation that heavenly bodies must move in perfect, uniform circular paths. Because the observed motions of the Sun, Moon, and planets appeared irregular—sometimes slowing down or reversing direction—astronomers like Ptolemy developed complex mathematical systems using epicycles and deferents to reconcile these observations with the requirement of uniform circular motion. This system was later reinforced by its alignment with religious dogma, which favored an Earth-centered universe as a reflection of divine order.231