General relativity (GR) is a theory of gravitation that was developed by Einstein between 1907 and 1915. According to it, the observed gravitational attraction between masses results from the warping of spacetime by those masses. General relativity has developed into an essential tool in modern astrophysics; it provides the foundation for the current understanding of black holes, regions of space where gravitational attraction is so strong that not even light can escape.
General relativity (GR) is a theory of gravitation that was developed by Einstein between 1907 and 1915. According to it, the, observed gravitational attraction between masses results from the warping of spacetime by those masses. General relativity has developed into! an essential tool in modern astrophysics; it provides the foundation for the current understanding of black holes, regions of spac:e where gravitationa.l attraction is so strong that not even light can escape.