To returnn to the original discussion for a moment, about how we can see starlight (and galaxy-light). The sun may be only 8 light-minutes away, but the light rays crewated in the interior of the sun do not burst out in seconds - the sun is not transparent. A photon created in the centre of the sun is emitted, absorbed, re-emitted, etc, and slowly makes its way out in a random walk, averaging about 30,000 years (I quote from memory, but it is of this order) to escape the sun's surface. So if the sun were 600-10000 years old, it would still be dark, unless photons were created already in transit.
But this is all just theory (based on physics which has been tried and tested for the past century and more), so there is no reason why creationists should believe it.
Mike Holland.