Feynman Lectures On Gravitation -

: Detailed discussions on planetary motion (including the perihelion shift of Mercury), gravitational waves, and the behavior of light in gravitational fields.

: He posits the existence of a massless particle with spin 2 and derives the consistency requirements that lead directly to the non-linear Einstein field equations. Feynman Lectures on Gravitation

The 16 lectures cover a wide range of advanced theoretical physics, including: : Detailed discussions on planetary motion (including the

The Feynman Lectures on Gravitation (1962–63) is a unique graduate-level exploration of general relativity that departs from traditional geometric interpretations. Instead of starting with curved spacetime, Feynman approaches gravity as a (the graviton) coupled to the energy-momentum tensor, demonstrating that Einstein’s equations are the inevitable result of this quantum field theory approach. Core Philosophical Approach Instead of starting with curved spacetime

: Explorations of "superstars" (early precursors to quasars), wormholes, black holes, and the large-scale structure of the universe (cosmology).

: He treats gravity like other fundamental forces, using tools from quantum electrodynamics (QED) and particle physics.