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5mo ago

Physicists Propose Rotating Universe to Resolve Hubble Tension

A new study suggests the universe may rotate once every 500 billion years, offering a potential solution to the persistent discrepancy in cosmic expansion measurements.

Pictured: Stock image of an astronomical observatory under a sky of star trails at night.
The Universe May Be Rotating Once Every 500 Billion Years, And It Could Explain The Hubble Tension
Major Problem in Physics Could Be Fixed if The Whole Universe Was Spinning
Our planet, solar system and even the Milky Way galaxy are spinning. So could the universe be spinning, too? Image via Pixabay.

Overview

  • The Hubble tension refers to conflicting measurements of the universe's expansion rate, with local observations suggesting 73 km/s/Mpc and cosmic microwave background data indicating 67 km/s/Mpc.
  • Researchers from Hungary and the U.S. propose that a slow cosmic rotation, completing one turn every 500 billion years, could reconcile these differences.
  • The rotating universe model predicts expansion rates that align with both local and global measurements without violating known physical laws.
  • The study, published in the Monthly Notices of the Royal Astronomical Society, incorporates a rotational term into standard cosmological equations to bridge the measurement gap.
  • Next steps include developing detailed numerical simulations and observational strategies to test for subtle indicators of cosmic rotation.