Recent comments in /f/space

zorbiburst t1_j9juvc8 wrote

The "wormhole" sci fi depiction of black "holes" as literal holes in space/spacetime is cool, that's probably all there is to it.

Is it generally accepted that they're as you described, not holes but just really dense spheres with gravity so strong even light doesn't escape?

clarification: I am whatever is even less informed than a layman

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jamx02 t1_j9ju6hc wrote

Quasars. The accretion disks that surround their central engine black holes emit radiation that can outshine the entire galaxy cluster in which they reside. In fact, these disks can produce more light than tens of trillions of our suns combined. The energy output of quasars can even surpass that of entire galaxies merging, and they are more powerful than the peak of a supernova, emitting a continuous stream of energy.

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adastraperabsurda t1_j9jsmuj wrote

How unknowable it still is- the combination of known unknowns and the unknown unknowns.

The stuff of matter and energy is only 5% of our universe. And we know only a tiny fraction of that and barely understand the small fraction of that tiny bit.

The rest is 25% dark matter and 70% dark energy.

We know what dark matter kinda is. We don’t know anything about dark energy.

And we’re just whirring around a giant blue marble in all of it.

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