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What is the expected size of primordial black holes?
I often see it implied that primordial black holes tend to be small compared to stellar masses;
Since primordial black holes did not form from stellar gravitational collapse, their masses can be ...
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0
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1
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When did the universe become lighter than water at 1 g/cm3 [closed]
Did the universe become lighter than water before light could travel through it?
What temperature was it at the time where matter was roughly 1g/cm3?
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