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Thread: Dark Matter: All Wrong?

  1. #1 Dark Matter: All Wrong? 
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    This could be interesting! I've always had my doubts about dark matter but I'm no scientist.

    Dark Matter: All Wrong?

    Larry O'Hanlon, Discovery News

    Aug. 3, 2007 — The mysterious dark matter that's been called on to make sense of the ways galaxies twirl through space may not exist, if an alternative theory is right.

    The surprising way galaxies rotate — as if they are much larger and heavier than they appear to be — has long implied to astronomers and astrophysicists that there is more matter out there holding things together than we see.

    That unseen and unseeable matter has fallen under the catch-all term "dark matter." These days, the most likely candidate for what makes up dark matter is some sort of weakly interacting particle that we've so far failed to detect.

    But there is another radically different possibility: What if gravity itself doesn't work quite the way we think? Maybe at the outer edges of galaxies where the gravitational acceleration — the g — of a galaxy is extremely small, gravity tugs just a tad bit more.
    http://dsc.discovery.com/news/2007/0...spa_print.html


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  3. #2  
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    If this theory is found to be true, I've one thing to say to everyone.

    I told you so. :P


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  4. #3  
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    Quote Originally Posted by Jeremyhfht
    If this theory is found to be true, I've one thing to say to everyone.

    I told you so. :P

    No Jeremy. You never said that gravity needed to be modified (which is what the "MO" in "MOND" stands for). You only stated that no one was doing the calculations right using the good ol' gravity we all know and love.

    You told us nothing.
    "... the polhode rolls without slipping on the herpolhode lying in the invariable plane."
    ~Footnote in Goldstein's Mechanics, 3rd ed. p. 202
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  5. #4  
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    ...you sure have a bad way of interpreting what I say. That wasn't what I was usually attempting to get across as. When I was suggesting the calculations were "Wrong", this is what I was implying.
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  6. #5  
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    I get the impression that gravity will end up in roughly the same situation as momentum. Another Einstein will come along. This time, instead of using different velocity rules at speeds that approach C, perhaps he'll give us different gravity rules at distances that approach some really high constant?
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  7. #6  
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    Ok you guys really have to see this. Too cool. I posted this same thread on several different forums. This is one of the replies I got. It's a YouTube video relating to this thread subject. It'll be easier to just link to that reply then to try and copy it here.

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  8. #7  
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    They draw an interesting analogy between matter in general and cornstarch.
    I'm not quite sure exactly how similar they think the two are. Or maybe they're suggesting that waves of a certain frequency are permeating the entire cosmos in some way? Maybe they move through space itself, or maybe they're independant of it?


    I don't know. Maybe I'll have to watch it a few more times. It's pretty interesting though.
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  9. #8  
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    Quote Originally Posted by kojax
    They draw an interesting analogy between matter in general and cornstarch.
    I'm not quite sure exactly how similar they think the two are. Or maybe they're suggesting that waves of a certain frequency are permeating the entire cosmos in some way? Maybe they move through space itself, or maybe they're independant of it?


    I don't know. Maybe I'll have to watch it a few more times. It's pretty interesting though.
    I think there was a post higher up on that thread that talked about waves. Most of it is over my head but I find it interesting just the same.
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