Kepler
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
Kepler
Newton
The Genius of Isaac Newton
A Modern Derivation of Newton’s Revolutionary Proof of the Inverse-Square Law
Music
In the Celestial Chorus, Earth Sings Alto
From Pythagoras to Kepler, mathematicians saw music in the motions of the planets.
Astrophysics
Kepler’s Laws of Planetary Motion
The laws of planetary motion.