https://singularityhub.com/2023/02/09/why-do-black-holes-twinkle-scientists-studied-5000-star-eating-behemoths-to-find-out/
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2/9/23 at 3:04pm
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Singularity Hub
Author
Christian Wolf
The brightness of the glowing black holes can fluctuate from day to day, and nobody is entirely sure why.
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