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Homework Help: Astronomy: Estimate the age of the observable universe

  1. Jan 26, 2009 #1
    1. The problem statement, all variables and given/known data
    How does the speed of light's finiteness limit the size of our observable universe? Using the speed of light (c = 3 x 10^8 m/s), estimate the age of the observable Universe in years given its estimated size of about 10^26 m.

    2. Relevant equations

    3. The attempt at a solution
    So I'm trying to use age = distance/speed, but I'm not sure how to use it with the speed of light. I know the replacement method with Hubble's constant, but it seems like we need to use the speed of light. Plugging in the given distance and speed of light, I don't see how the units will come out in years. Any tips?
  2. jcsd
  3. Jan 26, 2009 #2


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    Homework Helper

    Can't you just convert the answer from seconds to years?
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