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Old 04-23-2009   #8 (permalink)
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Re: How far can we see?

Yes, Sman, If you're talking in terms of light travel time distance then there's a cosmic horizon somewhere between 13 and 14 billion lightyears. No light can have taken longer to reach us. But, this is not the only distance cosmologists speak in terms of. In an expanding cosmos it is sensible to speak of distances which are greater than the light travel time.

Ned Wright's cosmology tour under the heading Many Distances explains:
Cosmology Tutorial - Part 2
And here's one of many Hypo threads on the topic:
Distance to the Furthest Visible Objects
~modest


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