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High-Pitch Black Holes Revealed

Supermassive black holes generate powerful X-rays as they feast on their accretion disks, but until now the most active (and the "loudest") have remained hidden from view.

July 28, 2016
1:03 PM EDT
Image: The blue dots in this field of galaxies show galaxies that contain supermassive black holes emitting high-energy X-rays. The black holes were detected by NASA's Nuclear Spectroscopic Array, or NuSTAR, which spotted 32 such black holes. | NASA/JPL-Caltech