I recently saw an FB post about a recently found quasar that formed 670 million years after the big bang with a trillion sun brightness, or mass or something, I can't find the article now.

But it got me thinking, if the atoms of our universe were condensed enough, as in the very early universe, could a black hole be formed before a star has a chance to ignight, or it ignights breifly as it forms?

5 hours ago, dimreepr said:

if the atoms of our universe were condensed enough, as in the very early universe, could a black hole be formed

Yes, of course.
The common perception is that once a certain mass density is exceeded, collapse to a BH is required.
But, mass being a specific form of energy, whenever a certain energy density is exceeded ( as in a hot, dense, radiation-dominated, early universe ), collapse to a BH is also required.

In GR, there is no mass term contributing to curvature, only energy-momentum, but it was always thought energy density variations would have been very small ( arising from Quantum fluctuations in the even earlier, causally connected universe ), but recent evidence from large space-based telescopes hints that the massive BHs at the centers of galaxies may have formed first ( as in your Quasar example ) as 'seeds' for subsequent galaxy formation.

This seems relevant as one example: https://en.wikipedia.org/wiki/Primordial_black_hole

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.

Edited 4 hours ago4 hr by pzkpfw