Really awesome post. I read "Fabric of the cosmos" , Brian Green and explains this concept as well. I cool concept is if we found "life" and we could look at it via telescope ( not possible) that we would be looking into the past. What ever we see is just a light memory of what was there. They have been long gone. Vice versa for anyone "viewing" us from 5,000 light years. Is that correct?
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Yes, that's certainly correct. We'll be seeing 5,000 years into the past, and by the time we reach them they will be long gone. An excellent point!