Why there is no dark matter.

Discussion in 'Astronomy, Exobiology, & Cosmology' started by Cris, Sep 5, 2016.

  1. Cris In search of Immortality Valued Senior Member

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    I realize there are numerous speculations on the nature of dark matter/energy, what it is, and where it is, and of the very nature of space. From my simplistic perspective I understand that space is expanding at an accelerated pace and that the existence of dark matter appears to be the main speculation that satisfies the math.

    I believe the assumption is that the big bang occurred in a void, or rather there was nothing - there was no space until the the BB created it. However, if multiverse speculations are correct and that there are or has been a possible infinite previous number of BBs, all of which would have created there own space, wouldn't it be likely that there is space everywhere. So our BB would have erupted into already existing space. What then would occur as the momentum of our space interacted with existing space? If space has a particle nature with each particle protecting its own "personal" zone, wouldn't that mean that as our space met existing space they would necessarily spread out so they could mesh - this is the essence of expansion. As our space continued to expand in all directions under the momentum of the BB it would need to mesh with an increasing quantity of existing space which would explain the accelerated expansion we observe.

    If that were the case, then that explains why there is no dark matter - it is not a necessary component to explain accelerated expansion of space.

    How quickly can this idea be torn apart - first post or more?

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  3. origin Trump is the best argument against a democracy. Valued Senior Member

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    First of all you are going to have to understand the difference between dark matter and dark energy to get anywhere in this conversation. Try Google and get back afterwards.
     
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  5. Cris In search of Immortality Valued Senior Member

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    Hmm - OK. Dark energy in the title would have been more appropriate. Having enough matter other than normal to allow galaxies to form seems not to be explained by my idea. Although the back pressure from a massive new quantity of space hitting existing space seems worthy of further thought. Not sure how that would affect the gravity needed to allow early galaxies to form without dark matter. Fishing here - before I go back to sleep.
     
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  7. paddoboy Valued Senior Member

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    DM is not the reason why the universe/spacetime is accelerating in its expansion rate.
    The aspect of why the universe is accelerating in its expansion rate is know as "Dark Energy" as we are as yet totally mystified as to its nature, although many believe it to be similar to the CC [Cosmological Constant] of Einstein fame.
    The nature of Dark Matter, although still unknown, is theoretically thought to be either WIMPS [Weakly Interactive Massive Particles] and MACHO's [Massive Astronomical Compact halo Objects] or probably a combination of both.
    DM has been evidenced many times, with gravitational lensing and the Bullet Cluster observation.
    http://chandra.harvard.edu/press/06_releases/press_082106.html
    The BB is a theory of the evolution of the universe/space/time from a hotter denser state that we are able to reasonably presume from 10-43 seconds after the initial event.
    Our theories do not cover from t=0 to t+10-43 seconds.
    Any hypothesis re this level is purely speculative, including multiverses, and parallel universes.
    If a future QGT should support the scenario of other universes, then it will most likely entail the present data we have and the validity of the BB, although extending the parameters of which we are able to make reasonable assumptions.
     
  8. paddoboy Valued Senior Member

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    The universe/space/time is a tug of war affair between gravity from the density of the mass/energy within the universe, and the nature of the DE component or whatever component is causing spacetime to expand. As expansion continues and mass/energy remains constant, the density, hence gravity grows less and consequently the expansion starts speeding up.
    Expansion is obvious over large universal scales.
    This is illustrated with higher than normal density regions like our local group of galaxies, that are gravitationally bound: ie, the gravity of such regions overcomes the expansion of spacetime.
    On even smaller levels, the other forces such as the strong nuclear and EMF act to keep bodies etc together.
     
    Last edited: Sep 5, 2016
  9. origin Trump is the best argument against a democracy. Valued Senior Member

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    Huh?
     
  10. LaurieAG Registered Senior Member

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    That's an interesting perspective Cris, as the Planck 2013 results show 4.82 +/- 0.05% ordinary matter and 25.8 +/- 0.4% dark matter. This inertial matter = (dark matter + ordinary matter) = ordinary matter * 2 * Pi +/- 1% (i.e. 25.8+4.82=4.82*2*Pi +/-0.1%).

    https://en.wikipedia.org/wiki/Planck_(spacecraft)#2013_data_release
     
  11. KilljoyKlown Whatever Valued Senior Member

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    My speculation about dark energy depends on weather virtual particles are real or not. If all space in our local universe is made up of virtual particles, then the expansion can be explained by a continuous small increase in the number of virtual particles in any given volume of space. Just like the example of the a balloon expanding as more air is added to it. More virtual particles would account very nicely for our expanding universe. But if true where and what are virtual particles being generated from?

    But then I'm still not convinced virtual particles are real and my speculation is just that, speculation.
     
  12. timojin Valued Senior Member

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    WHAT DO YOU THINK
    SOMETHING IS WRONG WITH DARK MATTER
    http://www.cnn.com/2016/09/07/opinions/dark-matter-analysis-lincoln/
     
  13. paddoboy Valued Senior Member

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  14. paddoboy Valued Senior Member

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    From your article:
    Nobody knows what the final answer will be. That's why we do research. But there is no question that there is a mystery in the cosmos. Galaxies don't act as we expect. The LUX measurement is a powerful new bit of information for astronomers to consider and has added to the general confusion, forcing scientists to take another look at ideas other than WIMPs.
     
  15. KilljoyKlown Whatever Valued Senior Member

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