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So if I understand correctly the black hole was there already, doing nothing, and then some matter was passing near it and started falling inside, releasing the
by ajuc 2y ago
So if I understand correctly the black hole was there already, doing nothing, and then some matter was passing near it and started falling inside, releasing the surplus energy as radiation in the proccess?
- m463 2y agoI've always wondered what happens if two black holes run into each other? Can previously trapped matter somehow escape?
- ajuc 2y agoThe only way anything "escapes" from black holes is Hawking Radiation - virtual pairs of particles that appear and disappear constantly - can be split when they happen on event horizon - and that slowly drains the energy from black hole. https://en.wikipedia.org/wiki/Hawking_radiation https://en.wikipedia.org/wiki/Hawking_radiation If 2 black holes collide - they join together.
- DEADMINCE 2y agoI know this comment is old, but I was wondering if you could randomly explain something I've wondered about for some time. Doesn't Hawking radiation, since it exits a black hole, violate the idea that nothing escapes a black hole?
- 0xfae 2y agoEssentially, yes, but not exactly. My understanding is that particles and anti-particles pop into existence randomly, but quickly cancel each other out. Normally this doesn't affect anything, but if they happen to pop into existance right on the border of the event horizon, one will fall in and one will fall away. Thus matter is very very very slowly "leaving" the black hole. But not because matter inside is making it out, but rather because of some interesting quantum features of the fabric of spacetime.
- DEADMINCE 2y agoThanks for replying and your explanation!
- umvi 2y ago> If 2 black holes collide - they join together. Presumably though some of the matter "escapes" as energy released during the merger, in the form of gravitational waves.
- ArnoVW 2y agoYes. If memory serves this is the first event that LIGO detected. Two black holes of 20-30 solar masses each, joining and releasing 1-2 solar masses worth of gravity. Which resulted in the earth (and space) being stretched by less than a fraction of a proton. And we measured it...
- okanat 2y agoInterferometers are just magical in their accuracy.
- nomel 2y agoMerging black holes release more energy than anything else in the universe: https://bigthink.com/starts-with-a-bang/merging-supermassive-black-holes/ https://bigthink.com/starts-with-a-bang/merging-supermassive...
- mr_toad 2y agoI thought the energy came from the gravitational potential between the two black holes.