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8protons

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accretion-discs

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2 Questions

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15
votes
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What is the most dense object in the universe?

universe density
Jun 4 '19 at 17:57 user28281 1
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views

If a black hole does not emit light, how can one take a picture of the black hole itself?

black-hole light photography accretion-discs event-horizon-telescope
Feb 18 at 15:31 Mark Foskey 2,245
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