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NASA spacecraft spots monster black hole bursting with X-rays 'releasing a hundred times more energy than we have seen elsewhere'
Astronomers have used space-based telescopes, including NASA's Swift X-ray observatory, to watch a monster black hole spring to life with powerful X-ray eruptions.
Astronomers have used space-based telescopes, including NASA's Swift X-ray observatory, to watch a monster black hole spring to life with powerful X-ray eruptions.
