This artist's impression provided by the European Southern Observatory in July 2018 shows the path of the star S2 as it passes close to the supermassive black hole at the center of the Milky Way galaxy. (M. Kornmesser/ESO via AP)
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A consortium of astronomers said Thursday they had for the first time confirmed a prediction of Albert Einstein's theory of general relativity by observing the gravitational effects of a supermassive black hole on a star zipping by it.Astronomers followed the S2 star as it passed close to the black hole on May 19 at a speed in excess of 25 million kilometers per hour.They then calculated its velocity and position using a number of instruments and compared it with predictions made by Einstein that the light would be stretched by the gravity in an effect called gravitational redshift. Astronomers already use another effect predicted by Einstein's theory of general relativity – that a black hole can bend passing light.
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