Explanation:

Copernicus in his book On the Revolution of the Heavenly Sphere argued that the earth and the planets move around the sun in concentric circles. Even though the theory was imperfect, it aroused thinking and reasoning. Kepler further developed this theory and said that the other planets move in elliptical paths around the sun. He also argued that magnetic attractions between the Sun and the planets kept the heavenly bodies in an orbital motion. Further on this assumption, Isaac Newton developed his Law of Universal Gravitation. With his self manufactured telescope, Galileo discovered the moons of Jupiter, the rings of Saturn and spots in the Sun. He also confirmed the findings of Copernicus.