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Space Probes Sent by Aliens Could Arrive in Reverse. Here's Why.

If we ever detect an Extraterrestrial Civilization (ETC) and start communicating with them, the messages could take years, decades, or even centuries to travel back and forth. ....

United States , United Kingdom , Graeme Smith , Stephen Hawking , Andrew Kennedy , Proxima Centauri , Robert Goddard , University Of California , Department Of Astronomy , Journal Of The British Interplanetary Society , International Journal Of Astrobiology , Extraterrestrial Civilization , Solar System , International Journal , Milky Way , British Interplanetary Society , Wait Calculation , Incentive Trap , Unidentified Aerial Phenomena , Breakthrough Starshot ,