This is a bit of a simplification, as Kepler himself was a complex figure. He did not fully embrace the heliocentric model until he developed his own laws of planetary motion.
Here's a more nuanced explanation:
* Early Career: Kepler started out as a strong supporter of the geocentric model, which placed the Earth at the center. This was the prevailing model of the time, based on the work of Ptolemy.
* Tycho Brahe's Influence: Kepler worked for the famous astronomer Tycho Brahe, who had collected extensive and precise data on planetary positions. Brahe himself proposed a hybrid model with the Sun orbiting the Earth but all other planets orbiting the Sun. This model was still geocentric in a sense, but it gave the Sun a more prominent role.
* Kepler's Laws: After Brahe's death, Kepler studied the data and eventually developed his three laws of planetary motion. These laws, which described the elliptical orbits of planets around the Sun, were powerful evidence for the heliocentric model.
* Full Acceptance: While Kepler never fully abandoned the idea of a geocentric universe, his laws of planetary motion made the heliocentric model the dominant one and paved the way for the modern understanding of the solar system.
Therefore, while Kepler may not have embraced the heliocentric model immediately, his discoveries ultimately led to its widespread acceptance. He is considered a crucial figure in the transition from the geocentric to the heliocentric model.