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Clearest Black Hole Signal Ever Puts Einstein's Gravity to the Test For scientists tracking gravitational waves from across the cosmos, GW250114 stands out as a landmark event. It is the clearest gravitational-wave signal ever recorded from a binary black hole merger , offering an exceptional opportunity to put Albert Einstein's theory of gravity — general relativity — to the test. Related space and physics reporting A Signal That Redefines Precision in Gravitational Wave Astronomy "What's remarkable is that this event closely mirrors the very first detection we made in decade ago, GW150914 ," said Cornell physicist Keefe Mitman , a NASA Hubble Postdoctoral Fellow at the Cornell Center for Astrophysics and Planetary Science. "The difference is clarity our detectors are now vastly more precise than they were ten years ago." Mitman is a co-author of the study Black Hole Spectroscopy and Tests of General Relativity with GW250114 , published in Physical...