• gazter@aussie.zone
    link
    fedilink
    English
    arrow-up
    0
    ·
    10 days ago

    I’m not sure if this answers the question, but it might help.

    Everything in space is moving, but it’s not expanding outward from a central point, like an explosion. Instead, the space between the things is getting bigger.

    The balloon analogy gets thrown around a lot, but I find it misleading- It’s not about the balloon getting bigger, expanding outward from the center of the sphere. It’s more about the surface of that balloon stretching.

    The rubber sheet analogy helps. Scatter a bunch of things on a infinite rubber sheet. Now stretch that in all directions - the things get further apart, but are not moving away from a central point.

    • Lysergid@lemmy.ml
      link
      fedilink
      English
      arrow-up
      0
      ·
      10 days ago

      Does it mean space being created out of nothing between things? I’m not good at it but wouldn’t that violate conservation of energy?

      • NotLemming@lemm.ee
        link
        fedilink
        English
        arrow-up
        0
        ·
        10 days ago

        How? There’s nothing between the things so I’m guessing there’s no energy?

        • Lysergid@lemmy.ml
          link
          fedilink
          English
          arrow-up
          0
          ·
          10 days ago

          My understanding Quantum field theory says virtual particles can be created out of vacuum fluctuations, which makes me think there will be more energy after expansion. Again, I might be getting it wrong.

          • NotLemming@lemm.ee
            link
            fedilink
            English
            arrow-up
            0
            ·
            10 days ago

            I’d say you’ve more chance of being right than me since I know nothing about it. I mean how can a particle be virtual lol. I thought a vacuum meant no particles.