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Thread: Sorry to ask. How does mapping the CMB help determine the age of the universe?

  1. #1
    Join Date
    Nov 2004
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    5,610

    Sorry to ask. How does mapping the CMB help determine the age of the universe?

    I've tried to understand the connection, and I don't get it.
    Last edited by parallaxicality; 2020-Jun-02 at 01:43 PM.
    "Occam" is the name of the alien race that will enslave us all eventually. And they've got razors for hands. I don't know if that's true but it seems like the simplest answer."

    Stephen Colbert.

  2. #2
    Join Date
    Sep 2006
    Posts
    1,858
    I don't understand it very well myself, but let me point you to some explanations by people who do:

    Daniel Eisenstein has written
    - a simple version
    - and a more sophisticated one

    Martin White gave this presentation back in 2008 -- perhaps it will help, too.
    - Martin White's presentation on Baryon Acoustic Oscillations

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