kuriteru t1_iri7yns wrote on October 8, 2022 at 11:29 AM

Reply to comment by ExactCollege3 in Can an object that’s not a black hole be so dense or massive that it has an event horizon? by ExactCollege3

Its more about density than just mass, every mass has S radius that it tips over into blackhole territory but will not trap light before that point.

Only singularities can warp space time enough to trap light making a blackhole it also doesn't help that we lack the math to fully explain blackholes entirely, all values involved end at either 0 or infinite or some impossible arithmetic involving the two extremes

Gprime5 t1_irl6jjr wrote on October 9, 2022 at 2:36 AM

You don't really need the density either.

If you had enough air at standard Earth atmospheric density, then that would create a black hole.

The calculation works out that 3.8 Billion kg of air at standard Earth density will form a black hole.