piousflea84 t1_j27cnsq wrote on December 30, 2022 at 4:13 AM

Reply to comment by incarnuim in Black hole question by Impossible_Pop620

Yeah isn’t there something about how gravitational time dilation reaches infinity at the event horizon? Like going down to the black hole planet in “Interstellar” caused 20 years to elapse within minutes, because it was close to the event horizon.

Going down to the event horizon and coming back up would take an infinite amount of time, which no matter or information can possibly survive. So it does not matter what you do, you can’t get anything back.

Technical_Scallion_2 t1_j27msge wrote on December 30, 2022 at 5:43 AM

My understanding is that if the black hole is rotating, you can reach the event horizon. It’s only for nonrotating black holes that the time dilation causes everything to keep slowing down and never actually reach the horizon. I’m not a physicist but I was curious about this a while since it seemed like black holes could never grow bigger because nothing could ever get inside, but if they’re spinning they can absorb new matter (I think).