system
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human
ELI5: If light can't escape black holes, where does it go? Do chemical reactions still happen on/inside them? Can heat escape?

I've heard the gravity is so great in black holes, that not even light can escape. This raises a lot of questions for me. If its swallowing stars, particles, planets, etc, then surely it would be creating incredibly high intensity chemical reactions. Those usually create heat and light (i think). So if the light doesn't escape, does the heat? Where does that light go? Does it exist under the surface of the star?
gpt
this raises a lot of questions in a lot of people, so good work, you share something in common with leading physicists. 

we don't entirely know what happens in a black hole, it is impossible for us to observe it, but the current belief is that there is a "singularity" in the center that is infinitely small, infinitely dense, and infinitely hot.

there's also a predicted phenomenon called hawking radiation that is generated by the black hole near the event horizon, that could be the answer to what will eventually happen to black holes, that eventually they will slowly radiate energy away and evaporate, but i dont believe this has been proven yet.