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Inflation — 5 Comments

  1. I am not an expert on inflation, but my understanding is that the inflation period, the “explosion” in question, didn’t create matter. It did create a whole lot of space.

    …does the matter of the universe in our gentle expansion increase, decrease, or stay the same?

    As I understand it, ordinary “matter,” dark matter, and ordinary energy (like starlight or cosmic microwave photons) stay the same as we expand. I’m not confident I can tell you what the recently-discovered dark energy is doing; my guess is that it gets used up in driving our present gentle expansion. Just how? Another hot problem in today’s astrophysics.

    When and if Brenda Frye gets around to this topic, I’d bet she’ll explain it better.

    • Thanks for the clarification! I had this crazy idea (thinking as a non-scientist) that perhaps dark matter might have a vital role in expansion if it is creating new dark matter, necessarily increasing space (it would have to go somewhere). It is amazing, however, to think that the universe has expanded with the same amount of matter and energy in it!

  2. Thank you for this article, Dr. Frye. Do you — or any other cosmologists on this blog — have any comments to share with us about the recently published work by Ahmed Farag Ali and Saurya Das, “… which gets rid of the big-bang singularity and predicts an infinite age of our universe.”[1]?

    I read about this work on [2] and would be interested in learning more about the implications of this theory.

    [1] A.F. Ali, S. Das. Cosmology from quantum potential. Physics Letters B, 741(4), 2015, pages 276–279.

    [2] T. Ghose. Big Bang, Deflated? Universe May Have Had No Beginning. February 27, 2015.

  3. In reference to the Comments by Helen Karn regarding a cosmology “… which gets rid of the big-bang singularity and predicts an infinite age of our universe.” Lectures by Father Bill Stoeger are available on YouTube where he addresses this issue. I recommend his presentation titled “Cosmology, Evolution, Causality and Creation”. In February of 2012 Father Bill lectured on this topic to an Astronomy club here in Anthem, AZ where he stated that “The Big Bang is NOT an event, but simply a term for the past limit of the hotter, denser phases we encounter as we go back in time to the Planck era; it stands outside presently tested physical theory; it is NOT the “very beginning”.

    We are blessed to have the legacy of Father Bill available on-line.

    Jim Renn
    Anthem, AZ

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