A substance of arbitrarily low density can form a black hole if there is enough of it.(adsbygoogle = window.adsbygoogle || []).push({});

So I took the mean density of the universe and calculated how big it would have to be to form a black hole. It's a surprising coincidence that the swartzchild radius in light years is the exact age of the universe. Is this just a coincidence or is the universe analogous to a black hole?

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# Observable universe as a black hole

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