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Thread: Challenge to cosmology

  1. #1 Challenge to cosmology 
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    https://www.sciencenews.org/article/...osmology-space


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    The hierarchical structure of the universe, which started forming directly after the BB, seems rather ill-defined for such large scale formations (1,2). So this new observation starts with some reservations about it, particularly with some of the high-brows in this aspect of cosmology.

    Quoting from 2 :

    "While quasars can represent dense regions of the universe, one must note that all of the quasars in the sky are evenly distributed, that is, one quasar per few million light years, making their significance as a structure very unlikely."

    end quote

    These are very complex observations. And the interpretation of data may be where some problems with theory arise. The OP article notes "The Giant Arc appears about three times as long as that theoretical threshold."

    A recent Forbes article suggests such large structures may result from observational artifacts (3). This is a brief story, uniquely told largely in pictures, but seems to do a good job of defining the possible nature of such large scale structures. And that nature is, as expected again, rather ill-defined.

    Perhaps this new study circumvents such artifacts. But it will likely be some time before the current observation is confirmed, if at all. No doubt there will be some naysayers. But the story is quite interesting. Time will tell as to the reality of such large structures (or not).


    "List of largest cosmic structures"

    1. https://en.wikipedia.org/wiki/List_of_largest_cosmic_structures


    2. https://en.wikipedia.org/wiki/Huge-LQG


    "The Largest Structures In The Universe May Not Actually Exist"

    3. https://www.forbes.com/sites/startsw...ctually-exist/


    Last edited by Double Helix; June 12th, 2021 at 02:13 PM.
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  4. #3  
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    Quote Originally Posted by Double Helix View Post

    The hierarchical structure of the universe, which started forming directly after the BB, seems rather ill-defined for such large scale formations (1,2). So this new observation starts with some reservations about it, particularly with some of the high-brows in this aspect of cosmology.

    Quoting from 2 :

    "While quasars can represent dense regions of the universe, one must note that all of the quasars in the sky are evenly distributed, that is, one quasar per few million light years, making their significance as a structure very unlikely."

    end quote

    These are very complex observations. And the interpretation of data may be where some problems with theory arise. The OP article notes "The Giant Arc appears about three times as long as that theoretical threshold."

    A recent Forbes article suggests such large structures may result from observational artifacts (3). This is a brief story, uniquely told largely in pictures, but seems to do a good job of defining the possible nature of such large scale structures. And that nature is, as expected again, rather ill-defined.

    Perhaps this new study circumvents such artifacts. But it will likely be some time before the current observation is confirmed, if at all. No doubt there will be some naysayers. But the story is quite interesting. Time will tell as to the reality of such large structures (or not).


    "List of largest cosmic structures"

    1. https://en.wikipedia.org/wiki/List_of_largest_cosmic_structures


    2. https://en.wikipedia.org/wiki/Huge-LQG


    "The Largest Structures In The Universe May Not Actually Exist"

    3. https://www.forbes.com/sites/startsw...ctually-exist/
    What theory are you inclined towards? Why?
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