Imagine I have a telescope with strong enough zoom to observe the earth like google maps street view, if I looked at the earth very closely from 500 light years away, would I see 1524 happening in real time? Or time as it is now?
It was actually a thing in a scifi show i watched a while ago in which earth was made uninhabitable. The crew of the FTL ship took one last look at earth while their equipment could still reach it, and they saw a blue planet instead of the barren rock they left behind.
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