Final answer:
Isaac Newton's contributions to understanding planetary motion through gravity laid the foundation for modern physics.
Explanation:
Isaac Newton was the scientist who addressed the cause of planetary motion, which is gravity, and laid the groundwork for modern-day physics. Newton's precise definition of the gravitational force and his proposal of the mathematical form explaining the motion of heavenly bodies were groundbreaking in the scientific world.
Learn more about Isaac Newton's contributions to physics here:
https://brainly.com/question/30841567
