Time dilation & the first galaxies

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SUMMARY

The discussion centers on the concept of time dilation in relation to redshift and the formation of early galaxies. It confirms that galaxies detected at redshifts of around 10, approximately 480 million years after the Big Bang, did not form in less than 45 million years of real time. This conclusion is supported by using Ned Wright's cosmological calculator, which accounts for light travel distance and the effects of time dilation on our observations. The conversation highlights the importance of understanding these concepts in the context of cosmology.

PREREQUISITES
  • Understanding of redshift and its implications in cosmology
  • Familiarity with time dilation concepts in physics
  • Knowledge of the Big Bang theory and early universe formation
  • Experience using Ned Wright's cosmological calculator
NEXT STEPS
  • Research the implications of redshift on galaxy formation
  • Explore the functionality of Ned Wright's cosmological calculator
  • Study the effects of light travel distance on astronomical observations
  • Investigate alternative cosmological models and their interpretations of time dilation
USEFUL FOR

Astronomers, astrophysicists, and students of cosmology seeking to deepen their understanding of time dilation, redshift, and the early universe.

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As far as I understand, time dilation corresponding to redshift has been confirmed for distant supernova.
However, galaxies are being detected only 480 million years after the bigbang at redshifts of around 10 or more.
Does this mean they took less than 45 million years to form in real time?
 
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No, that was taken into account in arriving at an age of 480 million years after the BB. You can confirm using Ned Wright's cosmo calculator.
 
Yes, that's better thanks.
I was forgetting about light travel distance, and that it is only our view that is time dilated.
Too much time playing with alternate cosmologies with more literal forms of time dilation.
 

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