University of Manchester: Colossal black holes locked in cosmic dance at heart of galaxy

Astronomers find evidence for the tightest-knit supermassive black hole duo observed to date.An epic deep space cosmic ballet of two giant black holes orbiting one another every two years has been observed for the first time by an international team

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,Keith Grainge ,Tony Readhead ,Sandra Oneill ,Albert Einstein ,University Of Manchester Jodrell Bank ,National Science Foundation ,Astrophysical Letters ,Jodrell Bank ,Sandrao Neill ,Milky Way ,