may

  • SuperJetShoes@lemmy.world
    link
    fedilink
    arrow-up
    0
    ·
    1 year ago

    I’m not a physicist (read "couldn’t do the maths“) but MOND feels closer to an natural, organic explanation than Dark Matter. Are there planets formed from Dark Matter? Are there elements and dark molecular structures?

    Please can I have a motorcycle made of it?

    • cynar@lemmy.world
      link
      fedilink
      English
      arrow-up
      0
      ·
      1 year ago

      One of the things with dark matter (specifically WIMPs, Weakly Interacting Massive Particles) is that they don’t seem to interact with any force other than gravity. This means they can shed momentum, by interacting with each other, or normal matter. In order for a dense object to form from a cloud, the cloud, as a whole, must shed, or cancel out the momentum of the particles involved. WIMPs would not be able to do this via anything other than gravity. This limits their collapse to around galaxy scale.

      In short WIMPs can’t form anything more complex than an incredibly diffuse inert gas cloud. We can only detect those clouds on a galactic scale, via their gravity effect.