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Feb16-12, 07:36 AM
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Quote Quote by Fredrik View Post
That's the number of years that the oldest light has been traveling towards us, but due to the expansion of the universe, the actual radius in significantly larger. I don't remember exactly, but I think it's about 45 billion light-years.
Yes, I agree, and I knew that but got sidetracked by the silliness of the concept of the OU getting bigger because of telescopes so I fixated on the photon age, not the current diameter (which of course IS getting bigger, but not because we have better telescopes)