this post was submitted on 28 Sep 2025

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Anon makes games (sh.itjust.works)

submitted 1 year ago by Early_To_Risa@sh.itjust.works to c/greentext@sh.itjust.works

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[–] brotundspiele@sh.itjust.works 3 points 1 year ago (7 children)

There actually is a method that could be used to extract energy out of a black hole. Probably not something you'd build in a watch-sized device though.

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[–] gandalf_der_12te@discuss.tchncs.de 5 points 1 year ago (4 children)

it only seems to work for rotating black holes though?

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[–] brotundspiele@sh.itjust.works 7 points 1 year ago

Yeah, that's why you have to wind up your watch every now and then. To spin up its internal black hole again.

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[–] HeyThisIsntTheYMCA@lemmy.world 2 points 1 year ago

just drink more it'll start spinning soon enough

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[–] muts@feddit.nl 2 points 1 year ago (1 child)

Don't they all spin though? As in any matter falls in one way or another angular momentum is gained.

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[–] ProfessorPeregrine@reddthat.com 2 points 1 year ago

It is possible, but very unlikely. Maybe two bh merge that has exactly opposite angular momentum.

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[–] WorldsDumbestMan@lemmy.today 1 point 1 year ago (1 child)

If the well, event horrizon expands when a blackhole takes more mass, why can't we just figure out how much volume it is compressed into by measuring the event horrizon increase?

We know the matter that goes in is a certain size. Maybe we can deduce the total size it is compressed to? And the size the blackhole gains.

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[–] rtxn@lemmy.world 3 points 1 year ago*

It's impossible to know based on the current understanding of particle physics. A black hole is formed when the inward gravitational force exceeds the outward neutron degeneracy pressure of a sufficiently massive object, which is what keeps neutrons from occupying the same space (not really, it's complicated). Beyond that, only conjecture exists with no evidence, and the information paradox makes it impossible to observe the space inside the event horizon.

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