Can rotation solve the Hubble Puzzle?

Rotation and cosmic isotropy

• Commenters note that a rotating universe would introduce a preferred axis and thus anisotropy, contradicting a core assumption of standard cosmology.
• Constraints from the CMB (especially dipole consistency with our velocity) are cited as strong evidence against large-scale anisotropy.
• The “axis of evil” in CMB data is mentioned; some argue it suggests a cosmic axis, others point to later analyses (e.g., 2016 WMAP/Planck comparison) finding no significant anisotropy. Disagreement remains in the thread about how compelling this “axis” actually is.

Center, axis, and reference frames

• Several people question what it even means for the universe or spacetime to rotate: rotate relative to what?
• Others counter that rotation is absolute (unlike linear motion) because it produces observable effects like centrifugal and Coriolis forces; no external reference is required.
• A rotating spacetime would imply a central axis and potentially undercut conservation laws derived from spatial symmetries, so it would be a major revision to modern physics and demands very strong evidence.

Black-hole interior and Gödel-inspired models

• The paper’s black-hole-interior and Gödel-inspired rotating cosmology prompts discussion of whether a rotating universe implies a center, whether we could be “inside” a black hole, and if so what “center” means (singularity lying in the future, not a spatial location).
• People link this to closed timelike curves in Gödel’s solution and note that the paper claims a rotation near the maximal value that still avoids CTCs at the horizon.

Finite vs infinite universe and Planck-scale digression

• Long sub-thread debates whether the universe is finite or infinite, emphasizing that “denser in the past” does not automatically mean “spatially small,” and that an infinite universe can expand.
• Another sub-thread argues over whether Planck length is a true minimum length or just a measurement limit, and how this interfaces with special relativity, QFT, and renormalization. Consensus: current theories break down near that scale; what really happens is unknown.

Galaxy spin anisotropy and evidence

• A previously publicized claim of preferred galaxy spin direction is raised as possible support for cosmic rotation.
• Other commenters say that work is widely viewed as cherry-picked and note papers titled along the lines of “no evidence for anisotropy in galaxy spin directions.”
• One participant asks for direct, paper-level rebuttals of that specific study; the response points to earlier null-result studies rather than a dedicated post hoc refutation.

Hubble tension and numerical plausibility

• One commenter performs rough “napkin math” and finds the paper’s implied angular velocity (~4×10⁻²⁰ rad/s) is only an order of magnitude below that which would give tangential speeds ~c at the observable edge.
• Another notes that this rough factor-of-10 proximity is in the same ballpark as the few-percent Hubble tension, suggesting it’s at least not obviously absurd, but this remains an informal numerical sanity check, not a consensus.