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Thread: Uiniverse Expansion Questions

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    Default Uiniverse Expansion Questions



    My numbers may be dated, but if the Hubbles Constant is 70.4 kilometers per second per megaparsec (uncertainty 2%).
    Then:
    The expansion must take a serious amount of energy.
    The Universe is expanding faster than the galaxies are moving so there is a lot of space between matter and the space beyond it..
    At the frontier of the expansion( I know there is no frontier, but there is space), is it a pure vacuum or is there something there.
    With that amount of energy, could it create dark energy as a side effect or even dark matter.
    Thanks
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    Default Re: Uiniverse Expansion Questions

    Quote Originally Posted by michael131313 View Post
    My numbers may be dated, but if the Hubbles Constant is 70.4 kilometers per second per megaparsec (uncertainty 2%).
    Then:
    The expansion must take a serious amount of energy.
    Careful. Don't think that it takes continual power. The initial energy is simply kinetic energy that persists through conservation. True that dark energy provides some acceleration. However in a universe without dark energy the expansion could still be just coasting along with slow decrease of the rate due to gravitational attraction.

    The Universe is expanding faster than the galaxies are moving so there is a lot of space between matter and the space beyond it..
    There is no space beyond matter. The universe and all space has matter everywhere.

    At the frontier of the expansion( I know there is no frontier, but there is space), is it a pure vacuum or is there something there.
    The universe has matter everywhere.

    With that amount of energy, could it create dark energy as a side effect or even dark matter.
    Thanks
    No. It's not enough. The kinetic energy of expansion is tiny compared to the rest mass energy equivalent of dark energy or dark matter or even normal matter.
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    Default Re: Uiniverse Expansion Questions

    As always thank you for your help.
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