Can rotation solve the Hubble Puzzle?
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Can rotation solve the Hubble Puzzle?
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Re: Can rotation solve the Hubble Puzzle?
#2Wait did nobody seriously consider rotation yet? Everything is rotating. Angular momentum is conserved.
Re: Can rotation solve the Hubble Puzzle?
#3Wait did nobody seriously consider rotation yet? Everything is rotating. Angular momentum is conserved.
Isotropy is a fundamental assumption that is very hard to let go of.
Re: Can rotation solve the Hubble Puzzle?
#4> All objects within our universe rotate, including planets, stars, solar systems, galaxies, and galaxy clusters. Moreover, black holes, spherically symmetric objects with horizons, display near maximal rotation as presented by Daly (2019). The idea that everything revolves [...] naturally extends to the whole universe, as hinted by recent claims of anisotropic Hubble expansion in X-ray observations by Migkas et al. (2021). Furthermore, a plausible syllogism is that the universe has near-maximal rotation, motivated by cosmologies where the universe is the interior of a black hole (Pathria 1972).
Re: Can rotation solve the Hubble Puzzle?
#5Wait did nobody seriously consider rotation yet? Everything is rotating. Angular momentum is conserved.
Where would the axis of rotation be?
Re: Can rotation solve the Hubble Puzzle?
#6I seem to recall there was an article posted here recently which noted that galaxies have a preferred direction of rotation. Seems like the universe itself rotating could be a reason why?
Re: Can rotation solve the Hubble Puzzle?
#7Wait did nobody seriously consider rotation yet? Everything is rotating. Angular momentum is conserved.
That would imply a preferred direction in the universe (the axis of rotation) and thus anisotropy.
There are stringent constraints on anisotropy from the cosmic microwave background.
In particular, one can use the Doppler effect to check whether the CMB dipole is compatible with our velocity with respect to the CMB frame.
Re: Can rotation solve the Hubble Puzzle?
#8Wait did nobody seriously consider rotation yet? Everything is rotating. Angular momentum is conserved.
Rotation implies a great many observables and properties of the universe. There would be a cosmic axis, which implies a cosmic center and a cosmic north. Both concepts that are problematic in an infinite universe. If the universe is in fact inside of a black hole of a different universe - some of these problems go away as the Hubble volume would be the finite boundary of the universe.
Re: Can rotation solve the Hubble Puzzle?
#9Wait did nobody seriously consider rotation yet? Everything is rotating. Angular momentum is conserved.
Rotation implies a great many observables and properties of the universe. There would be a cosmic axis, which implies a cosmic center and a cosmic north. Both concepts that are problematic in an infinite universe. If the universe is in fact inside of a black hole of a different universe - some of these problems go away as the Hubble volume would be the finite boundary of the universe.
and we would be at the center?
Re: Can rotation solve the Hubble Puzzle?
#10Earlier quoted context omitted.
Rotation implies a great many observables and properties of the universe. There would be a cosmic axis, which implies a cosmic center and a cosmic north. Both concepts that are problematic in an infinite universe. If the universe is in fact inside of a black hole of a different universe - some of these problems go away as the Hubble volume would be the finite boundary of the universe.
and we would be at the center?
My dog is quite sure she’s at the center, if we’re trying to be specific