How do we see light from the distant past?

We are just now seeing light from galaxies that formed a few hundred million years after the big bang. I would think that a now-distant galaxy we are observing was relatively close to us at the time it formed. Why are we only now seeing the light from its formation. Is it because our two galaxies are moving away from each other at a speed close to the speed of light? Otherwise, I would think that the light from that event would have passed by us long ago.

拉里甲板
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