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Einstein's equivalence principle tested near a supermassive black hole

Galactic center photograph. Picture credits: European Southern Observatory (ESO). The GRAVITY Collaboration, a research team of several renowned institutes, including the Max Planck Institute, the LESIA Paris Observatory and the European Southern Observatory, has recently tested part of the Einstein Equivalence Principle, namely the Local Positon Invariance (LPI) in the Near the galactic center supermassive black hole. Their study, published …

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