Lecture
This lecture covers the testing of General Relativity in the solar system, focusing on geodesics in Schwarzschild spacetime and the perihelion advance. The instructor explains the Einstein equations, geodesic equations, and the energy-momentum tensor, comparing the theory to the Newtonian limit. The Schwarzschild metric, spherical symmetry, and circular orbits are discussed, highlighting the absence of certain features in Newtonian gravity. The lecture concludes with an explanation of the perihelion advance as the point of closest approach to the Sun, emphasizing the impact of massless and massive objects on orbits.