"These black holes are relatively close to the Milky Way, but they have remained hidden from us until now," said Ady Annuar, a graduate student at Durham University in the United Kingdom, who presented the results at the American Astronomical Society meeting in Grapevine, Texas. "They're like monsters hiding under your bed."
For more information on NuSTAR, visit: http://www.nasa.gov/nustar - http://www.nustar.caltech.edu/
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Jet Propulsion Laboratory, Pasadena, Calif.