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Originally Posted by Lunatik
George, this is a very interesting point, about the CMB. Taking it one step further, if we continue to examine the greatest possible distances with progressively longer wavelengths, even beyond the microwave range, what will we see? Since redshift (which may or may not be space-expanding-Doppler related) will continue to stretch wavenlength with distance, it would stand that the further we look the longer will be the necessary wavelength to image anything there. Assuming we have the technological capability to do this, we should either see more galaxies beyond our current viewing threshold, or if BB is true, then we should see nothing. But if we do image beyond the theorized ABT and more and more galaxies show up, no matter how fuzzy, then the whole idea of BB is thrown into doubt. This will be the key experimental evidence for the future to determine whether BBT is true or not. Of course, this would mean we would have to break the 'CMB barrier'. I can't wait!
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Unfortunately, we have to allow time for that light to reach us. Viewing objects more than 13 or so billion years ago would mean we would have to enter a stargate and go somewhere else to see it ( :wink: ), or wait till it gets here. At some point in our future, the redshift would be so great that the photons would be undetectable. This is speculation on my part as I see redshift as primarily Doppler.
I think it is likely that there are galaxies beyond our light cone. However, I am much better with ice cream cones than light cones.
