It's not accurate to say that a single person "discovered" Earth's movement. It was a gradual process involving observations, theories, and advancements over centuries. Here's a breakdown:

Ancient Greek Observations:

* Pythagoras (c. 570-495 BCE): Proposed a spherical Earth, but didn't offer a model for its movement.

* Aristarchus of Samos (c. 310-230 BCE): First to propose a heliocentric model (Sun-centered) with Earth revolving around the Sun. However, his ideas were not widely accepted.

* Hipparchus (c. 190-120 BCE): Measured the Earth's circumference and studied the movement of stars, contributing to the understanding of Earth's rotation.

Medieval Period:

* Nicolaus Copernicus (1473-1543): Published "De Revolutionibus Orbium Coelestium" in 1543, reviving the heliocentric model and providing detailed arguments for it.

The Scientific Revolution:

* Galileo Galilei (1564-1642): Used his telescope to observe the phases of Venus, providing strong evidence for the heliocentric model. He also observed the moons of Jupiter, further challenging the geocentric (Earth-centered) view.

* Johannes Kepler (1571-1630): Developed the laws of planetary motion, explaining the elliptical orbits of planets around the Sun.

* Isaac Newton (1643-1727): Developed the law of universal gravitation, explaining the forces that govern the movements of celestial bodies, including Earth.

Conclusion:

While Aristarchus is often credited with first proposing the heliocentric model, it was Copernicus who significantly advanced the theory and provided detailed mathematical calculations. The scientific revolution provided further evidence and understanding of Earth's movement through the work of Galileo, Kepler, and Newton.

It's crucial to remember that the discovery of Earth's movement was a culmination of many brilliant minds over centuries, building upon each other's observations and theories.