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352 points instagraham | 5 comments | | HN request time: 0.646s | source
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d--b ◴[] No.43533448[source]
> 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!

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1. 0xEF ◴[] No.43533488[source]
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?
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2. exe34 ◴[] No.43533520[source]
I think it would be more that the entire universe is in a black hole spinning in a certain direction.
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3. iainmerrick ◴[] No.43533584[source]
It's not that black holes prefer a direction, it's just that they have a direction at all. It's one of the very few observable properties of a black hole.

If I'm following correctly, the "we're inside a black hole" idea is a major reach, connecting at least two unrelated concepts (black holes could contain baby universes; black holes have spin). But it's a really interesting idea and not obviously wrong.

4. kingsleyopara ◴[] No.43533593[source]
Exactly and anything new entering the spinning black hole is likely to inherit its spin.
5. f1shy ◴[] No.43533625[source]
Is inside the article:

"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