>>725344479
>We are assuming general relativity is correct
Because it has been rigorously tested for a century
>that doesn't mean those are actually the black holes it predicts because we can't observe them to verify that
What we can observe is in full agreement with what would be described as a black hole
Our understanding of what exactly a black hole is, specifically what happens beyond the apparent event horizon, is incomplete, but there is no doubt that black holes exist
>>725344504
>But matter can only be compressed so much
When the force of gravity is strong enough to essentially crush atoms there is no known force that can resist total gravitational collapse.
It is understood that true singularities are illogical and probably impossible, but we do not have a working theory of what happens to matter under such extraordinary conditions.
>Black holes that get too big start to eject mass (Quasar/Blasar).
Mass cannot be ejected from a black hole by definition. Absolutely nothing can escape a black hole's gravity beyond the event horizon, not even light.
Quasars and similar phenomena are the result of mass captured in a black hole's accretion disk getting literally annihilated and accelerated to relativistic speeds by the extraordinary forces around the black hole.
