Quote:
Originally Posted by worth
I'm not a physicist but... it would have had to happen at least 7.5 billion light years ago. even though the universe is expanding, it is empty space that is expanding faster than the speed of light. photons cannot excede the speed of light no matter if the universe is expanding faster than the speed of light or not.
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Right, but those photons are stretched because of the expansion of space, and that redshift is what is used to determine the distance... so if it was 6 billion light years away when it actually happened and then space expanded by 1.5 billion light years during light's transit so that it took a total of 7.5 billion light years for the light to get here.
I'm just confusing myself I think
