A binary black hole (BBH), or black hole binary, is an astronomical object consisting of two black holes in close orbit around each other. Like black holes themselves, binary black hole systems are classified as either stellar-mass—involving remnants of high-mass binary star systems or formed by dynamic processes and mutual capture—or supermassive, black hole systems believed to arise from galactic mergers.
A binary black hole (BBH), or black hole binary, is an astronomical object consisting of two black holes in close orbit around each other. Like black holes themselves, binary black hole systems are classified as either stellar-mass—involving remnants of high-mass binary star systems or formed by dynamic processes and mutual capture—or supermassive, black hole systems believed to arise from galactic mergers.
Source: Wikipedia "Binary black hole" · CC BY-SA 4.0
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