Example image of eyePlorer eyePlorer map for 'General relativity': Albert Einstein Geometry Gravitation Theoretical physics Physics Newton's law of universal gravitation Space Spacetime Special relativity Time in physics Curvature Four-momentum Mass–energy equivalence Matter Momentum Radiation Einstein field equations Partial differential equation Free fall Light Gravitational redshift Gravitational time dilation Shapiro delay Tests of general relativity Alternatives to general relativity Quantum gravity Quantum mechanics Black hole Star Active galactic nucleus Stellar black hole X-ray binary Gravitational lens Gravitational wave LIGO Physical cosmology Thought experiment Prussian Academy of Sciences Karl Schwarzschild Schwarzschild metric Electric charge Reissner–Nordström metric Universe Cosmological constant Edwin Hubble Metric expansion of space Alexander Friedmann Georges Lemaître Mercury (planet) Arthur Stanley Eddington