But if we can image it, then there IS an effect.
The photons emitted by that galaxy effect us, here in ours because we can see them.
It's the ones we can't see that are disconnected.
The photons emitted by that galaxy effect us, here in ours because we can see them.
It's the ones we can't see that are disconnected.
The light that we see today left them 10 billion years ago. Any light that leaves them now[1] will never reach us. And any light emitted by us now will never reach them.
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[1] Yes, I know, "now" is not really a useful concept when dealing with large velocities in Special Relativity. I don't think my overall point is destroyed by that, though. If you can find a more rigorous way to state what I am trying to say, please do.