this post was submitted on 17 Oct 2025
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Science Memes

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one bright second (mander.xyz)
submitted 2 weeks ago by fossilesque@mander.xyz to c/science_memes@mander.xyz
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[–] theunknownmuncher@lemmy.world 12 points 2 weeks ago (3 children)

Black holes aren't "dark"...

[–] yakko@feddit.uk 27 points 2 weeks ago (1 children)

These ones will be quite dim

[–] theunknownmuncher@lemmy.world 6 points 2 weeks ago (1 children)

Yeah, I suppose after a billion billion billion or so years, it probably would be

[–] yakko@feddit.uk 7 points 2 weeks ago (1 children)

The light will eventually tire out and turn into radio waves or smth, I'm not a physicist

[–] Holytimes@sh.itjust.works 3 points 2 weeks ago (1 children)

To al elder God that sees higher bands of the electromagnetic spectrum it would see be a very bright place!

[–] yakko@feddit.uk 1 points 1 week ago

Any self respecting elder god would be playing billiards with the black holes. Fire up the new big bang, ye tatterdemalion layabouts!

[–] Infernal_pizza@lemmy.dbzer0.com 2 points 2 weeks ago (1 children)

Is that because of the accretion disk?

[–] mkwt@lemmy.world 9 points 2 weeks ago (1 children)

And Hawking radiation. Hawking radiation is pretty "dark" for solar-mass scale black holes and up, but it can become relatively very intense for smaller holes.

For the holes we observe astronomically, the things we can see are the accretion disks and the orbits of stars around the black hole.

[–] frezik@lemmy.blahaj.zone 6 points 2 weeks ago (1 children)

But that happens because of matter falling into them, right? When they've already swallowed everything, there's not going to be accretion disks.

[–] bjoern_tantau@swg-empire.de 3 points 2 weeks ago (1 children)

Yeah, though eventually they should all evaporate one after another with a last huge tiny energy burst due to hawking radiation. But that will take a looooooooong ass time. And we still don't know (might never know) if hawking radiation is real.

[–] MotoAsh@piefed.social 2 points 2 weeks ago* (last edited 2 weeks ago)

They said the same thing about the curvature of spacetime 100 years ago. Then it was proven like three years later.