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Observable universe: expansion and light speed

  1. Nov 17, 2009 #1
    a. Is it known if there are actually regions of space which would be far enough and expanding at a rate enough that light will never be able to reach us?

    Or, is it possible to say that a boundary may exist in a way that, beyond it we can be sure that light will certainly not reach us?

    b. Also, please correct me on this (mis)conceptions: the light we detect from very very far distances, it can be "pulled" from the accelerating expansion of the universe if that rate is faster than the speed of light?

    c. Finally, the current accounted measure for "observable universe", to what extent does it recognize and distinguish the expansion rate of the universe / light speed?

    S--S-S-Sorry if this is tedious to hear if its a repetitively emergent topic... if another thread matches my inquiries please link them to me :) Thanks
    Last edited: Nov 17, 2009
  2. jcsd
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