General Relativity is Einstein’s theory of gravity (1915)
NEWTON ALREADY GAVE US A THEORY OF GRAVITY. WHY DID WE NEED A NEW ONE?
Newtonian gravity is inconsistent with the principle of causality in Special Relativity - that nothing can move faster than the speed of light
Newton’s inverse square law requires action at a distance - if one object moves, the other one knows about it instantaneously due to the change in the gravitational force, no matter how big their separation is.
COSMOS to HUMANITY, Spring 2008
Lecture 2 , slide 2