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Homework Help: Astronomy Help

  1. Mar 30, 2010 #1
    1. The problem statement, all variables and given/known data
    In a non-accelearting Universe, if the density of the Universe is equal to the critical density, then the Universe is

    A. open.
    B. closed.
    C. flat.
    D. empty.

    2. Relevant equations

    3. The attempt at a solution
    I believe the correct answer is flat, but I just wanted to see if anyone else knew? Thanks!
  2. jcsd
  3. Mar 31, 2010 #2


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    Science Advisor
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    That's what I would answer too.
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