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Loading contentA hypothesised black hole formed from density fluctuations in the very early Universe rather than from a star.
If the early Universe contained sufficiently dense regions, they could have collapsed directly into black holes of a wide range of masses. Primordial black holes have been proposed as a candidate for some or all of the dark matter.
Facts on this topic will be cited from these primary and reference sources.
Mission data, planetary science, space telescopes, and public-domain imagery.
Most NASA-produced imagery is in the public domain; individual items are checked for usage terms before publication.