Questioning the Expansion theory

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SUMMARY

The discussion centers on the interpretation of galaxy recession speeds in relation to the expansion of the Universe. It asserts that galaxies receding at distances D, 2D, and 3D correspond to speeds S, 2S, and 3S respectively, suggesting that the Universe's expansion is actually slowing down over time. The argument emphasizes the significance of the light travel time from distant galaxies, which reflects historical expansion rates rather than current velocities. The conversation references Hubble's Law as a critical framework for understanding these dynamics.

PREREQUISITES
  • Understanding of Hubble's Law and its implications on cosmic expansion
  • Familiarity with the concept of light travel time in astrophysics
  • Basic knowledge of galaxy recession velocities and redshift
  • Awareness of the implications of cosmic distances in observational astronomy
NEXT STEPS
  • Research Hubble's Law in detail, focusing on its mathematical formulation and applications
  • Explore the concept of light travel time and its effects on astronomical observations
  • Investigate the implications of redshift in measuring the Universe's expansion
  • Study current astrophysical theories regarding the rate of cosmic expansion and its historical context
USEFUL FOR

Astronomers, astrophysicists, and students of cosmology who are interested in the dynamics of the Universe's expansion and the interpretation of observational data.

ekeeley
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Current evidence shows that (in general) any galaxy a certain distance (D) from Earth will tend to recede from the Earth at speed (S). Also, galaxies at distance 2D tend to recede at speed 2S while those at distance 3D tend to recede at speed 3S. This is cited as evidence that the Universe is expanding ever faster. I take the opposite view.

Let’s take a galaxy and set D at 1X〖10〗^6 Light years (Ly). It will recede at speed S
Then a galaxy at 2X〖10〗^6Ly will recede at 2S.
And a galaxy at 3X〖10〗^6Ly will recede at 3S

However, due to the limit of the speed of light, we are not seeing current speeds or positions the light we see is not current.

So, since galaxy 3’s light is from 3X〖10〗^6 years ago, and since most galaxies that distance are receding at 3S from us, we can say that 3,000,000 years ago the Universe was expanding at rate 3S.

And, since galaxy 2’s light is from 2X〖10〗^6 years ago, and since most galaxies that distance are receding at 3S from us, we can say that 2,000,000 years ago the Universe was expanding at rate 2S.

And, since galaxy 1’s light is from 1X〖10〗^6 years ago, and since most galaxies that distance are receding at 3S from us, we can say that 1,000,000 years ago the Universe was expanding at rate S.

∴ The expansion of the Universe is slowing down.
 
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Chronos' response suitably addresses the misconception in this thread. Given that this is a borderline 'personal theory', I will close this thread here.
 

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