Kepler’s Second Law of Planetary Motion, Vector Calculus, and Force of Gravity How ‘vector interpretation’ of Kepler’s second law hints at the presence of gravitational force between the Sun and a planet
The Genius of Isaac Newton A Modern Derivation of Newton’s Revolutionary Proof of the Inverse-Square Law
In the Celestial Chorus, Earth Sings Alto From Pythagoras to Kepler, mathematicians saw music in the motions of the planets.