Astronomers witness supermassive black hole awaken - First Alert 4
(CNN) Astronomers may be witnessing a supermassive black hole roaring back to life something that has never been seen before.
In late 2019, astronomers noticed a sudden spike in brightness in an oth… [+707 chars]
In late 2019, astronomers noticed a sudden spike in brightness in an oth… [+707 chars]
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