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NuSTAR spies black holes in galactic web

In a new and sharper hunt for the Universe’s most violent events, astronomers may have found two medium-sized galactic monsters. Launched in June, NASA’S NuSTAR (Nuclear Spectroscopic Array) X-ray observatory has discovered what may be two intermediate mass black holes in a nearby galaxy — a missing link between stellar black holes and supermassive black holes. Principal investigator Fiona Harrison of the California Institute of Technology in Pasadena unveiled the mission’s first science on 7 January at a meeting of the American Astronomical Society in Long Beach, California. 


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