Quote:
Originally Posted by cordoba
Would be really weird, and a little sad, if we finally make contact with aliens and they are 1 and 1/2 billion light years away.
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Yeah, we receive a hello from 1.5 billion years away, we reply, another 1.5 billion years for our message to reach them - however they've already been wiped out by something in that time.
A lot happens in 3 billion years.