A simulation of the black hole merger GW190521, which resulted in a chirp heard seven billion years later by the LIGO and Virgo antennas.Credit...N. Fischer, H. Pfeiffer, A. Buonanno/Max Planck Institute for Gravitational Physics; Simulating eXtreme Spacetimes Collaboration Well, that was some clash of the heavyweights. Astronomers reported on Wednesday that they had detected the loudest, most mas
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