684824 external_news 1757705535 1757705535 Researchers previously tried to test these predictions with gravitational waves, but the comparatively weaker signals left a lot of uncertainty in the conclusions. The new tests offer a much greater level of confidence, says theoretical physicist Feryal Özel of the Georgia Institute of Technology, who was not involved in the research. “If we found any evidence of violation of either the area theorem or of the Kerr solution, then one or both of the assumptions would have to be changed,” she says. “In other words, either general relativity would need to be modified, or the objects are not black holes.”

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