Complete the following statement: Kepler and _ established the fundamental ideas of celestial mechanics.

Explanation

Galileo Galilei, an Italian scientist, made significant contributions to astronomy and physics during the 17th century. He conducted observations of the Moon, Jupiter's moons, and other celestial bodies using a telescope, challenging the geocentric model of the universe. While Galileo contributed to our understanding of the heavens and the fundamental ideas of celestial mechanics.