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October 19, 2021 02:45 pm
Original Link: http://rss.slashdot.org/~r/Slashdot/slashdot/~3/r-Iv9l3qLjQ/stars-strange-path-around-black-hole-proves-einstein-right----again
Star's Strange Path Around Black Hole Proves Einstein Right -- Again
Albert Einstein's theory of general relativity has aced another test. From a report: Following nearly 3 decades of monitoring, researchers have detected a subtle shift in the orbit of the closest known star to the supermassive black hole at the center of the Milky Way -- and the movement matches Einstein's theory precisely. The star, known as S2, follows an elliptical 16-year orbit. It made a close approach -- within 20 billion kilometers -- to our black hole, Sagittarius A*, last year. If Isaac Newton's classic description of gravity holds true, S2 should then continue along exactly the same path through space as on its previous orbit. But it didn't. Instead, it followed a slightly diverging path, the axis of its ellipse shifting slightly, a team using the European Southern Observatory's Very Large Telescope reports today in Astronomy & Astrophysics. The phenomenon, known as Schwarzschild precession, would, in time, cause S2 to trace out a spirographlike flower pattern in space -- as general relativity predicts.Read more of this story at Slashdot.
Original Link: http://rss.slashdot.org/~r/Slashdot/slashdot/~3/r-Iv9l3qLjQ/stars-strange-path-around-black-hole-proves-einstein-right----again
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