He demonstrated that the same force—gravity—governs both the falling of an object on Earth and the orbits of celestial bodies.
This three-volume work, authored by and Bertrand Russell , is a landmark in formal logic and the philosophy of mathematics. Principia Mathematica
To prove his theories, Newton utilized a new form of mathematical analysis that laid the groundwork for calculus. authored by and Bertrand Russell
1. Isaac Newton: Philosophiæ Naturalis Principia Mathematica (1687) Principia Mathematica