Scientists not so sure of rate of expansion now

Discussion in 'Physics & Math' started by curvature, Aug 10, 2018.

  1. curvature Registered Member

    Messages:
    41
  2. Google AdSense Guest Advertisement



    to hide all adverts.
  3. curvature Registered Member

    Messages:
    41
    I have to admit, I never understood why distant lanterns would tell us anything about the current rate of expansion, since that light takes such a long time to reach us, it must be therefore telling us something about the past rather than the current day. At best, those signals tells us that expansion was large early on. Further more, the true interpretation of expansion has to be taken as slowing down because as it has been noted, galaxies that pass through a distance will be moving at a much faster rate than those that pass the same distance at a later time, suggesting the Hubble parameter is in fact decreasing in time.

    https://en.wikipedia.org/wiki/Hubble's_law
     
  4. Google AdSense Guest Advertisement



    to hide all adverts.

Share This Page