If a quasar is detected with a redshift value of 5, how far is it at that time from the Earth?

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     about 12 billion light-years
      about 3 billion light-years
      about 28 billion light-years
      about 1 billion light-years
      about 5 billion light-years
asked Sep 20, 2012 in Astronomy by anonymous
    

1 Answer

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about 28 billion light-years
answered Sep 22, 2012 by SkyStar ~Expert~ (2,855 points)

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