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Thread: New theory postulates DE and DM are the same

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    Default Re: New theory postulates DE and DM are the same



    phys.org is doubling down with a second article on this topic, rightly so, i think. this one has a video and additional discussion. i'm on the verge of becoming a fanboy.....

    https://phys.org/news/2018-12-bizarr...tive-mass.html
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    Default Re: New theory postulates DE and DM are the same

    All I can say is "wow"! This is really interesting. Thanks nFA for another mind-blowing nugget in our most bizarre universe!
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    Default Re: New theory postulates DE and DM are the same

    Maybe this will lead to anti-gravity spaceships, not needing much energy to escape planets and go to far reaches of the universe??
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    Default Re: New theory postulates DE and DM are the same

    Quote Originally Posted by Star Dad View Post
    All I can say is "wow"! This is really interesting. Thanks nFA for another mind-blowing nugget in our most bizarre universe!
    I'm very excited about this. The fact that it checks against all the same observational boxes as the standard cosmology is very exciting!

    Quote Originally Posted by Mag95On View Post
    Maybe this will lead to anti-gravity spaceships, not needing much energy to escape planets and go to far reaches of the universe??
    I'm skeptical about that..... But there is a possible propulsion scenario.

    With this theory one can construct a simple anti gravity drive consisting of a positive mass in front connected to a negative mass in back. The positive mass would tend to run away from the negative mass which would follow it. The problem is in the connection.... You wind up conserving momentum and the link would have to be very strong. Net momentum might be zero....

    Where there is hope is actually for a sub light speed but nearly speed of light warp drive like the Alcubierre drive. Exotic mater like the negative mass fluid could fill the warp coils perhaps?
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    Default Re: New theory postulates DE and DM are the same

    hey nFA,
    utterly amazing theory. thank you for your excellent posts.
    a couple of thoughts/wonderings:
    - how would this affect our understanding of the Dark Energy dominated era expansion of the Universe
    that began about 4 billion years ago?

    https://en.wikipedia.org/wiki/Scale_...-dominated_era

    - guessing this has nothing to do with the matter-antimatter asymmetry problem?

    https://en.wikipedia.org/wiki/Baryon_asymmetry

    - just interesting to note that if the dark fluid with negative mass theory is correct,
    fascinating that the mix of regular matter/energy to negative is so lopsided (5% to 95%).

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    Default Re: New theory postulates DE and DM are the same

    Quote Originally Posted by chas53 View Post
    hey nFA,
    utterly amazing theory. thank you for your excellent posts.
    a couple of thoughts/wonderings:
    - how would this affect our understanding of the Dark Energy dominated era expansion of the Universe
    that began about 4 billion years ago?

    https://en.wikipedia.org/wiki/Scale_...-dominated_era
    It doesn't change anything.

    - guessing this has nothing to do with the matter-antimatter asymmetry problem?

    https://en.wikipedia.org/wiki/Baryon_asymmetry

    - just interesting to note that if the dark fluid with negative mass theory is correct,
    fascinating that the mix of regular matter/energy to negative is so lopsided (5% to 95%).
    So far it has nothing to do with matter antimatter asymmetry. But in a complete theory perhaps matter-antimatter asymmetry and positive-negative mass asymmetry are related through an ingenious spontaneous symmetry breaking mechanism.
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    Default Re: New theory postulates DE and DM are the same

    I follow the author of the paper on Twitter. One comment asked him about the possibility of finding evidence to support his theory. He commented back, "It is quite likely that the negative masses in this study are a mathematical tool, rather than real physical matter. This rules out a lot of sci-fi, which is disappointing of course!"

    So I take that to mean, at least according to him, no Alcubierre drive.
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    Default Re: New theory postulates DE and DM are the same

    Quote Originally Posted by Childersa View Post
    I follow the author of the paper on Twitter. One comment asked him about the possibility of finding evidence to support his theory. He commented back, "It is quite likely that the negative masses in this study are a mathematical tool, rather than real physical matter. This rules out a lot of sci-fi, which is disappointing of course!"

    So I take that to mean, at least according to him, no Alcubierre drive.
    Too early to speculate with certainty one way or the other. The negative mass fluid would have to be confinable and controllable. Then and only then is an Alcubierre drive possible.
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    Default Re: New theory postulates DE and DM are the same

    Quote Originally Posted by Childersa View Post
    I follow the author of the paper on Twitter. One comment asked him about the possibility of finding evidence to support his theory. He commented back, "It is quite likely that the negative masses in this study are a mathematical tool, rather than real physical matter. This rules out a lot of sci-fi, which is disappointing of course!"

    So I take that to mean, at least according to him, no Alcubierre drive.
    A "mathematical tool" does not preclude practical applications. Quantum physics is also a mathematical tool yet it is applied very successfully. Physicists are still rolling over the ground fighting about whether it is "real" or not but regardless, it works.
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    Default Re: New theory postulates DE and DM are the same

    Quote Originally Posted by not_Fritz_Argelander View Post
    Too early to speculate with certainty one way or the other. The negative mass fluid would have to be confinable and controllable. Then and only then is an Alcubierre drive possible.
    Even assuming you could build an Alcubierre Drive, wouldn't you end up with...'serious issues' in trying to go FTL with it? And wouldn't those same 'issues' apply with wormholes? (unless, maybe the trip is 'instant' for those on board the spacecraft or passing through the wormhole, but 'normal time' passes outside it. but, that probably also has issues.)

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