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Thread: Space expansion

  1. #1 Space expansion 
    Forum Freshman
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    Oct 2008
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    If an Alcubierre drive is possible..

    Let's say there is point a and point b that are one
    lightyear apart. Would there be

    A: A limit to how fast the space between a and b could contract....ie
    the warping of space can go no faster than c. But after the
    contraction of space the ship could cross from a to b faster than
    light for an unaltered distance.

    Basically it would take as long or longer to construct the path than it would to simply cross the distance.

    or B: No limit


    is there a limit to the speed at which a universe (and/or space) can expand or contract in size?


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  3. #2  
    Forum Sophomore
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    May 2008
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    I don't know if there is a limit to how fast space can expand, but if there is one, it is not c. The universe is roughly 13.7 billion years old, but over 90 billion light years in diameter.

    An interesting question is that of how you would measure the rate of expansion. I don't know if it would make sense to give it in m/s anyway.


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  4. #3  
    Forum Radioactive Isotope MagiMaster's Avatar
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    Jul 2006
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    I think any measure of changes in space would have to have units of something like meters per meter per second, which just works out to hertz. This is just a wild guess though, so don't take that thought too seriously.
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