Corroboration came with Eddington's 1919 observation of shifted star positions during a solar eclipse.
The vierbein formulation uses 4 reference vector fields. Alternatives include the Brans-Dicke theory, which predicts the Nordtvedt effect in binary system orbits due to violations of the Strong Equivalence Principle. Its field equation includes the cosmological constant to allow for a flat universe. Corroboration came with Eddington's 1919 observation of shifted star positions during a solar eclipse. FTP name Einstein's theory in which gravity results from mass-energy bending spacetime.
The vierbein formulation uses 4 reference vector fields. Alternatives include the Brans-Dicke theory, which predicts the Nordtvedt effect in binary system orbits due to violations of the Strong Equivalence Principle.
{general relativity} or {GR}