Topics for SOL 6 By Jocelyn_parra 1543 Galileo used the telescope to support the proof of the heliocentric theory 1543 Nicolaus Copernicus developed the heliocentric theory 1609 Johannes Kepler discovered planetary motion 1628 William Harvey showed that the heart acted as a pump to circulate blood throughout the body 1686 Isaac Newton published his law of gravity 1796 Edward Jenner introduced a vaccine to prevent small pox