Relativity

The geometric theory of gravitation, developed by Albert Einstein in 1915, unifies special relativity and Newton's law, depicting gravity as a curvature of spacetime influenced by mass-energy and momentum. Central to this theory are the Einstein field equations, which describe how matter and radiation affect spacetime. This framework leads to significant astrophysical insights, including the prediction of black holes, regions where space and time are so warped that nothing can escape, contributing to the understanding of phenomena like active galactic nuclei and microquasars.