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Besides the bigbang, are there other published theories about cosmic microwave

  1. May 29, 2010 #1
    That explain cosmic microwave background ? Cosmic microwave background (referring to the hiss that was detected by Wilson and Penzias, using microwave wavelength satellites, and it is found everywhere) and it is evidence of the big bang, but is it evidence of anything else?
    Are there other theories that explain what the cosmic microwave background is? Or do all of the theories attribute it to the big bang?
  2. jcsd
  3. Jun 1, 2010 #2
    That's a good question..

    I'd like to know the answer as well..
  4. Jun 1, 2010 #3


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    Big bang theory required and predicted the cosmic microwave background radiation. No competing theory suitably accounts for the CMBR.
  5. Jun 2, 2010 #4
    What other explanations are there for CMBR?
  6. Jun 3, 2010 #5


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    Steady state theory proposes the CMB is the sum of radiation provided by background stars out to infinity. This 'explanation' fails to account for the perfect blackbody spectrum of the CMB.
  7. Jun 3, 2010 #6
    OK, but you didn't really answer the question..

    You just sort of inverted the question, and then went forward.

    I'm not asking what the "steady state" theory attempts to explain or doesn't..

    I'm asking whether there are other explanations for the CMB..

    For example, maybe there's a theory that says the CMB is caused by "radiation emitted from neutron stars and pulsars" (or some such thing).

    I'm not saying this is necessarily the case, or that there is such a theory.

    I'm just saying "substitute what you will" for the "underlined part above"...

    In other words, there may be explanations for the CMB that have nothing to do w/ the origin of the cosmos. And if so, what are they?

    Are there any?

    Do they even exist?
  8. Jun 3, 2010 #7
    His answer to your underlined part was: Steady State Theory. He wasn't inverting the question, he was giving you the name of a theory which has an alternate explanation for the CMB (and then gave a reason why it's not as good a theory as the big bang).
  9. Jun 3, 2010 #8
    No, the Steady State theory is a theory that attempts to explain the origin of the cosmos, not the background CMB.

    A trip to wikipedia indicates that the Steady State theory was originated circa 1948, and the CMB was only discovered in 1964, so clearly the State State theory was not conceived as an explanation for CMB.

    My question is: are there other theories out there which attempt to explain the CMB, besides the Big Bang?
  10. Jun 4, 2010 #9
    Big Bang Theory is *also* a theory that explains the origin of the cosmos, like the Steady State Theory. It does not start out with the aim to explain the CMB, rather it predicts them and then observation confirms it. Steady State Theory as a theory of the origin of the cosmos then also tried to explain the CMB within its own framework.
  11. Jun 4, 2010 #10
    So the long and the short of it is that no one ever tried to explain the CMB, other than as some artifact left over from the origin of the cosmos, correct?
  12. Jun 4, 2010 #11


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    Certainly people have tried to explain the CMB such as Fred Hoyle, when he was trying to resuscitate the Steady State Theory in light of the discovery of the CMB as in: http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?1975ApJ...196..661H&data_type=PDF_HIGH&whole_paper=YES&type=PRINTER&filetype=.pdf [Broken].

    That was before the fluctuations in the CMB and its Power Spectrum were discovered.

    Last edited by a moderator: May 4, 2017
  13. Jun 4, 2010 #12
    I think the OP is seeking some other possible theories beside the one offered by Steady State Theory, but I don't know of any.
    Last edited by a moderator: May 4, 2017
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