Authors: George Rajna
The GRAVITY Collaboration, a team of researchers at several renowned institutes including the Max Planck Institute, LESIA Paris Observatory and the European Southern Observatory, has recently tested part of the Einstein Equivalence Principle, namely the local positon invariance (LPI), near the galactic center supermassive black hole.  A key aspect of Einstein’s general theory of relativity (GR) has been tested using the strongest gravitational field so far. The measurement was made by observing changes in optical absorption lines of a star orbiting close to Sagittarius A* – the supermassive black hole at the centre of the Milky Way. 
Comments: 28 Pages.
[v1] 2019-03-29 10:17:55
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