Year in review: Gravitational waves offer new cosmic views

Soon astronomers might detect black hole collisions as often as once a day

illustration of gravitational waves

MAKING WAVES  The first gravitational wave signal detected by LIGO came from the merger of two black holes spiraling inward, as depicted in this numerical simulation.

© S. Ossokine, A. Buonanno (Max Planck Institute for Gravitational Physics), Simulating eXtreme Spacetime project, D. Steinhauser (Airborne Hydro Mapping GmbH)

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