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  • JWST's surprising galaxies and Big G

    From stargene@21:1/5 to All on Sun Aug 20 21:38:36 2023
    The James Webb Space Telescope (JWST) has been revealing
    a large number of very high red shift galaxies which are unusually
    massive and bright for their age (several hundred million years
    after the big bang). This is a contradiction of today=E2=80=99s mainstream cosmology, which says they can=E2=80=99t have had nearly enough time
    and efficiency to grow that many stars so fast. Some possible
    explanations have arisen but with no compelling support yet.

    A naive suggestion: Would a somewhat larger value in big G
    in very early times help explain this unexpected efficiency?

    I do know that many if not all searches for cosmic change in the
    value of G have turned up essentially null, or at best, mixed
    results so far. But could the JWST results be a small hint?

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  • From Richard Livingston@21:1/5 to stargene on Mon Aug 21 13:43:32 2023
    On Sunday, August 20, 2023 at 11:38:42=E2=80=AFPM UTC-5, stargene wrote:
    ...

    A naive suggestion: Would a somewhat larger value in big G
    in very early times help explain this unexpected efficiency?

    ...

    I'm not an astrophysicist, but it seems to me that there are enough
    other things having to do with how galaxies and stars form that
    are unknown or at least fuzzy that questioning big G should probably
    be low on the list. For one thing, there is no known understanding
    for where big G comes from, and it certainly appears to be stable
    over recent times (a few billion years). There is much unknown
    about how early stars (with no "metal") form and radiate,
    compared to modern stars with "metal". I also wonder about the
    roll of super massive black holes. It is not clearly understood how
    they form so early, nor become so massive. There is a lot to
    ponder there that involves physics that we might figure out.

    Rich L.

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