Astronomers record heart-like rhythms of a black hole
NASA's Chandra X-ray observatory has found evidence of heartbeat-like pulses of a faraway supermassive black hole. Study of X-ray data revealed repeated bursts of energetic particles and shock waves generated by the black hole at the centre of galaxy NGC 4696. Researchers estimate that the black hole bursts or arrhythmic "beats" have occurred every five to ten million years. 