1. heliocentric model ( the sun is at the centre ).2. It introduced the main theoretical concepts of geocentric astronomy and references the heliocentric model . 3. The geocentric model was eventually replaced by the heliocentric model . 4. Aristarchus of Samos proposed a heliocentric model as an alternative view in Ancient Greece. 5. Contrary to the Copernican heliocentric model of the Universe. 6. But the East had no need of heliocentric models of the universe, said King of Frankfurt. 7. In 1543, Nicolaus Copernicus published a heliocentric model in his work " De revolutionibus orbium coelestium ". 8. This observation strongly supported the heliocentric model . 9. For example, the heliocentric model of the solar system originally had all the planets in circular orbits. 10. The theory of gravity allowed scientists to construct a plausible heliocentric model for the solar system quickly.
