GR and Cosmology

General Relativity (GR) is Einstein’s theory describing gravity as the curvature of spacetime caused by mass and energy. Instead of thinking of gravity as a force, GR explains how massive objects bend the fabric of space and time, influencing the motion of planets, stars, and light. In cosmology, GR is used to understand the universe’s structure, origin, and evolution. It predicts phenomena like black holes, the expansion of the universe, and cosmic phenomena. Overall, GR provides the framework for studying the large-scale dynamics of the universe, connecting gravity with the geometry of spacetime itself.