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Trimike
Oct20-10, 04:34 PM
I have recently read that a galaxy has been observed that is 13 billion light years from us.
If the origin of the universe occured 13.7 billion years ago, how did the galaxy obtain its position relative to us in 700 million years?

Kevin_Axion
Oct20-10, 05:36 PM
Galaxies were formed before 700 million years succeeding the Dark Ages, during the Reionization period, hence the light travelled here in ~13 billion years. What's the conflict? There may very well be galaxies further than 13.7 billions years, space doesn't accelerate at a rate constant to 1 light year per year.