Primordial black hole

Uncommon card · No. 87834

In cosmology, primordial black holes (PBHs) are hypothetical black holes that formed soon after the Big Bang. In the inflationary era and early radiation-dominated universe, extremely dense pockets of subatomic matter may have been tightly packed to the point of gravitational collapse, creating primordial black holes without the supernova compression typically needed to make black holes today. Because the creation of primordial black holes would pre-date the first stars, they are not limited to the narrow mass range of stellar black holes. First rejected in 1966 by Yakov Zeldovich and Igor Novikov then proposed by Stephen Hawking in 1971, these objects have been invoked to explain several issues in cosmology.

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