New Hubble Measurements Challenge Physicists: Space May be Smooth

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Discussion Overview

The discussion centers around new measurements from the Hubble Space Telescope that suggest the universe may exhibit smoothness, challenging existing physical theories. Participants explore implications for quantum gravity and the nature of space and time, with a focus on theoretical interpretations and potential explanations.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • Some participants express concern over the implications of the Hubble measurements, suggesting they challenge current understandings of the universe.
  • One participant highlights the ongoing uncertainty in the field, noting that much work remains to be done regarding quantum gravity.
  • Another participant claims to have previously completed a theory of quantum gravity, linking it to a broader Theory of Everything, though this claim is presented humorously and lacks detail.
  • A later reply discusses potential explanations for the observed phenomenon, including the idea that time and space might vary together at the Planck scale, or that the observed effects could be related to the Planck length squared, which would make them undetectably small.

Areas of Agreement / Disagreement

Participants do not reach a consensus; multiple competing views and interpretations of the implications of the Hubble measurements remain present in the discussion.

Contextual Notes

The discussion reflects limitations in current understanding of quantum gravity and the nature of space-time, with participants acknowledging the complexity and unresolved aspects of the theories involved.

Chagur
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New measurements of the universe using the Hubble is causing
some consternation among physicists ... Space may be smooth!

See: http://www.nature.com/nsu/030324/030324-13.html
 
Astronomy news on Phys.org
Interesting article, thanks.
As the article says, there's still much work to be done and still much that is not understood.
Can someone here please complete the theory of quantum gravity? I'd like this resolved soon, please. :wink:
 
I've correctly completed the theory of quantum gravity years ago. It was a subset of my Theory Of Everything. I'd post it here, but my dog at my notes. :wink:
You'd be surprised at how much everything depends upon the existence of blue orangutans.
 
The last paragraph of the article speaks well to possible explanations for the phenomenon within discrete theory:
One is that time and space might vary together at the Planck scale, keeping beams of starlight in their original formation. The other is that the wobbles might reflect the Planck length squared - about 10-60 metres [squared] - making the smearing undetectably small.
 

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