Observations made with the Very Large Telescope (VLT) of the European Southern Observatory (ESO) have, for the first time, detected the effects of general relativity predicted by Einstein, in the movement of a star passing into the intense gravitational field of Sagittarius A*, a massive black hole at the centre of the Milky Way. These results were obtained by the GRAVITY consortium, led by the Max Planck Institute for Extraterrestrial Physics (MPE) in Germany and also involving the CNRS, the Paris Observatory (PSL), the Université Grenoble-Alpes and several French universities. These findings, the culmination of 26 years of observations using telescopes at the ESO in Chile, were published by the GRAVITY consortium on 27 July 2018 in Astronomy & Astrophysics.