In the general theory of relativity, gravity is understood to arise as a consequence of spacetime curvature. Gravitational Physics involves investigations into the mathematical foundations of the theory, the nature of space and time, and theory's relationship with quantum mechanics. Experimental tests are performed in the laboratory and space, and analysis is performed for observations from astrophysics and cosmology. Modern research in the field has expanded beyond studying classical solutions of the Einstein equation to cover a broad range of subject in astrophysics, cosmology, and quantum gravity. Experiments include high precision tests of gravitational effects and sensitive observations of gravitational phenomena from astrophysics.
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