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The sound comes from the merging of supermassive black holes across the universe, according to scientists
Astronomers have detected a rumbling “cosmic bass note” of gravitational waves thought to be produced by the slow-motion mergers of supermassive black holes across the universe.
The observations are the first detections of low-frequency ripples in the fabric of spacetime and promise to open a new window on the monster black holes lying at the centres of galaxies.
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