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Lightyears and age

  1. Jun 23, 2003 #1
    If the light reaching us from a distant galaxy is said to has been travelling for 12 billion years, then it is said to be 12 billion light years away. Did someone forget to consider the fact that the galaxy has been moving away from us in the meantime? The distance must be at least the double.
     
  2. jcsd
  3. Jun 23, 2003 #2
    That's why they always say that we are only seeing things as they were 12 billion years ago.
     
  4. Jun 23, 2003 #3
    Re: Re: Lightyears and age

    What Mentat said. We are seeing what the conditions are like THEN! A lot probably has changed if we were to see things locally.
     
  5. Jun 25, 2003 #4
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