Well, I normally don't like to get into too much Big Bang
bashing or anything, but I may have come up some important
derivations. But first, please read through this thread and run
through the calculations. I know I need to give everyone in that
discussion time to look through them on that thread as well, but
I'll go ahead and start this going in the meantime. Now, the
time for light to travel to us while space is expanding is
t=(e(Hd/c)-1), where H is the current value for the Hubble
constant and d is the current distance to a galaxy from Earth
(Hr and df). For a constant rate of expansion, Tuniverse=1/H, so
let's find the furthest distance a galaxy can be where a pulse
of light would just now be reaching us since the time of the Big
Bang. That would be for t=T, so t=T=1/H=(e(Hd/c)-1)/H [EDIT-This
should be /He. This thread is incorrect. Sorry. -grav] That
gives us d=1.03972*10^26 meters for c=3*10^8 m/sec and
H=2*10^-18 sec-1. This value for d is the final distance
travelled over that time, df, so let's fin