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Is a new anomaly affecting the entire Universe?

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Key Takeaways

  • The most puzzling, unexplained anomaly in all of cosmology is the Hubble tension: the difference in the measured expansion rate depending on which method is used.
  • However, a second, less-publicized anomaly is also extremely puzzling: a difference in our observed motion through the Universe and how different things appear in various directions.
  • We have many different methods of estimating how the Universe differs in different directions, and they’re not all consistent with one another. That’s a real, unsolved, but important problem!
The largest anomaly is the Hubble tension.
Two expansion rate measurement methods yield incompatible values.
The early relic method, via cosmic imperfections, yields 67 km/s/Mpc.
The distance ladder method, from individually measured objects, yields 73 km/s/Mpc.
But another cosmic imperfection anomaly is similarly puzzling.
Consider the cosmic microwave background (CMB): leftover radiation from the Big Bang.
Although mostly uniform, one direction is ~3.3 millikelvin hotter while the opposite is similarly cooler.

(See article for images and narritive)

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https://bigthink.com/wp-content/uploads/2022/06/image1forweb.jpg?lb=1000,562At lower left, the actual signal of the temperature fluctuations is shown. In the other three panels, possible modifications to the microwave sky are shown due to rotation or other forms of anisotropy. By constraining the magnitude of these signals, we can demonstrate just how isotropic (the same in all directions) and non-rotating the Universe actually is. However, indicators other than the CMB do not give consistent results with what we observe here  Credit: D. Saadeh et al., Phys. Rev. Lett., 2016)

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Click the link below for the article:

https://bigthink.com/starts-with-a-bang/new-anomaly-universe/?utm_source=pocket_discover_science

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