Light travels at roughly 186,000 miles PER SECOND. That is why, to answer your question, we are able to find it, track it and / or pinpoint it.
The other celestial bodies are moving away from us, but the divergence has NOT exceeded 186,000 miles per second, I think the current calculations for expansion are closer to 30 / 38 miles per second.. (it's been a while since i've reviewed this subject, but the point is the VAST difference between thousands of miles per second verses tens of miles per second.) )this is also the explanation of RED Shift in the visual spectrum, as the bandwidth of light is stretched, similar to the effect that occurs with sound as objects move away from us..
Frequencies.