Cosmic Microwave Background Surveys

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SUMMARY

The discussion centers on the Cosmic Microwave Background (CMB) surveys and their relation to the Milky Way. It is established that the CMB is a universal phenomenon, originating from the hot plasma of the Big Bang, and is not confined to the Milky Way. The radiation has been traveling for approximately 13.8 billion years, reaching distances of around 45 billion light years. The participants clarify that the surveys are not limited to data within the Milky Way but encompass the entire visible universe.

PREREQUISITES
  • Understanding of Cosmic Microwave Background (CMB) radiation
  • Familiarity with the Big Bang theory
  • Knowledge of astronomical distances and light years
  • Basic concepts of universal expansion
NEXT STEPS
  • Research the implications of CMB surveys on cosmology
  • Explore the methods used in CMB data collection and analysis
  • Learn about the role of the Milky Way in cosmic observations
  • Investigate the significance of the CMB in understanding the early universe
USEFUL FOR

Astronomers, cosmologists, and students of astrophysics interested in the origins of the universe and the implications of CMB surveys on our understanding of cosmic structure.

Martyn Arthur
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TL;DR
Is the survey Universally representative?
If I understand correctly, by reference say here, the results seem to relate to a survey of the Milky Way.
1. Is the Milky Way a 'closed' system?
2. Whether or not, were the surveys based on data from the visible Universe, or restricted in all or part to the data form 'within' the Milky Way.
 
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Apologies, I intended to post only the link, not realizing it would start the video off!
 
The CMB is everywhere in the universe. The radiation comes from the hot plasma of the Big Bang and has been travelling since then. The stuff that emitted the radiation we now see as the CMB is currently around 45 billion light years away, far beyond the Milky Way.
 
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That is very clear thank you
martyn
 
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