LIGO snags another set of gravitational waves

Spacetime vibrations arrive from black hole collision 3 billion light-years away

illustration of gravitational waves

THREE OF A KIND  Scientists have made a third detection of gravitational waves. A pair of black holes, shown above, fused into one, in a powerful collision about 3 billion light-years from Earth. That smashup churned up ripples in spacetime that were detected by the LIGO experiment.

Aurore Simonnet/Sonoma State, MIT, Caltech, LIGO

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