Gravitational Waves, disturbances in space-time that are believed to spread outwards at the speed of light from locations where masses are being rapidly accelerated. Possible sources of such waves include: violent supernova explosions, which are accompanied by the collapse of stellar cores to form neutron stars or black holes; interacting black holes; pulsars (rotating neutron stars); and binary systems of neutron stars as their components coalesce and die.

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