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Complete layman's question: If we would indeed be inside a black hole wouldn't we be able to observe new energy and matter entering? Related question: the horizon of a black hole is expanding when the mass increases. Could this map to the expansion of our universe, which seems to expand faster and faster?
Clockwise relative to what? Does the universe have an "upwards" direction? Or is it just relative to all the other galaxies?
Earlier quoted context omitted.
I'm not well versed in celestial mechanics, but I see a lot of "we're in a black hole" comments so far, and I'm super curious as to whether or not we know why black holes prefer a direction of spin. Can you (or anyone, really) shed light on that?
I think it would be more that the entire universe is in a black hole spinning in a certain direction.
Clockwise relative to what? Does the universe have an "upwards" direction? Or is it just relative to all the other galaxies?
> Due to an effect called the Doppler shift, astronomers expect galaxies rotating opposite to the Milky Way’s motion to appear brighter How does this work? The page it links to doesn't explain why rotation would matter. Edit: To clarify - one side of the galaxy would be moving towards us, and one away from us, no matter which direction it spins in, so this should not affect the average brightness of the entire galaxy…
Everybody here is talking about the black hole hypothesis, but to me it seems that the other explanation, a wrong assumption about the rotation of our own galaxy, is more likely: because it could explain 2 other problems as well. > "The re-calibration of distance measurements can also explain several other unsolved questions in cosmology such as the differences in the expansion rates of the universe and the large gal…
> This preferred direction of spin might be due to one of two reasons: either our entire universe exists in a black hole, or astronomers have been measuring the universe’s expansion incorrectly This is the subtitle of the article. It’s such a great summary!
I'm not well versed in celestial mechanics, but I see a lot of "we're in a black hole" comments so far, and I'm super curious as to whether or not we know why black holes prefer a direction of spin. Can you (or anyone, really) shed light on that?
"A preferred axis in our universe, inherited by the axis of rotation of its parent black hole, might have influenced the rotation dynamics of galaxies, creating the observed clockwise-counterclockwise asymmetry,” Nikodem Poplawski
> Due to an effect called the Doppler shift, astronomers expect galaxies rotating opposite to the Milky Way’s motion to appear brighter How does this work? The page it links to doesn't explain why rotation would matter. Edit: To clarify - one side of the galaxy would be moving towards us, and one away from us, no matter which direction it spins in, so this should not affect the average brightness of the entire galaxy…
One side is moving away from us, the other towards. This means their relative speeds are different, detectably so.
Everybody here is talking about the black hole hypothesis, but to me it seems that the other explanation, a wrong assumption about the rotation of our own galaxy, is more likely: because it could explain 2 other problems as well. > "The re-calibration of distance measurements can also explain several other unsolved questions in cosmology such as the differences in the expansion rates of the universe and the large gal…
I don't understand how the 1e-16 Hz rotation of the Milky Way affects how we perceive other spiral galaxies' orientations.
I found this a little surprising as well