Consider how Isaac Newton’s discovery of gravity led to a better understanding of planetary motion. Isaac Newton’s formulation of the law of universal gravitation.

Who came first Galileo or Newton?

Newton was born in the year that Galileo died (according to the calendar then in use). Our story continues by picking up Galileo’s last work, on Mechanics. It was a development of Galileo’s ideas that led Isaac Newton to lay down his famous three laws of motion.

How did Isaac Newton discovered gravity?

The legend is that Newton discovered Gravity when he saw a falling apple while thinking about the forces of nature. Whatever really happened, Newton realized that some force must be acting on falling objects like apples because otherwise they would not start moving from rest.