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A Black Hole Choir.
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A Black Hole Choir.

The blue dots in this field of galaxies, known as the COSMOS field, 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 in this field and has observed hundreds across the whole sky so far. The other colored dots are galaxies that host black holes emitting lower-energy X-rays, and were spotted by NASA's Chandra X-ray Observatory. Chandra data show X-rays with energies between 0.5 to 7 kiloelectron volts, while NuSTAR data show X-rays between 8 to 24 kiloelectron volts. http://photojournal.jpl.nasa.gov/catalog/PIA20865

Date
2016-07-28
Photographer / author
NASA/JPL-Caltech
Collection
JPL
Archive
NASA Image and Video Library
Type
photograph

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Reason: a NASA work: not copyrighted in the United States.

Read from: NASA media usage guidelines: NASA material is not copyrighted in the US unless noted; no third-party credit or mark found.

Credit line

"A Black Hole Choir." (2016-07-28). NASA/JPL/NASA/JPL-Caltech. Public domain. https://images.nasa.gov/details/PIA20865

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