Currently there is a broad consensus that the unification of the four fundamental interactions of nature requires going beyond Einstein’s theory of General Relativity (GR). Einstein’s theory has successfully described the gravitational phenomena that we know and has important astrophysical implications. Remarkably, it predicts the existence of Black Holes, regions in which the spacetime is distorted in such a way that even light cannot escape from it. GR also predicts gravitational waves, which are ripples in space-time that propagate at the speed of light, transmitting changes in its curvature. Although general relativity successfully describes most of the gravitational phenomena that have been observed so far, it turns out to be incompatible with the description of the microscopic world characterized by quantum mechanics and in the explanation of the general composition of the universe. An attractive way to try to solve this inconsistency is string theory, which in turn requires supersymmetry, a kind of symmetry that relates bosons to fermions and under which the laws of nature are expected to be invariant at least up to a certain energy scale. The low energy limit of string theory is known as supergravity, which is a supersymmetric extension of GR.