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Hi Paul,
Thanks for your input, and for correcting me on the definition of the heliopause. I must say that I had thought that it was also a point where the sun's gravity basically stopped.
As for whether the Voyagers will ever return, that surely wasn't in the minds of the scientists at NASA, as they included a plaque with details of earth, our solar system and mankind on it, just in case it was ever found by another "intelligent being". But nevertheless, COULD it be that Voyager will eventually return?
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