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Originally Posted by Factoid
It was actually a sort of precursor to another question.
Let assume we have the technology to go far, far away from
our solar system. Really, really far. What about communication?
How would we effectively communicate with Houston?
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I'm not sure you could communicate effectively. While the waves would propagate throughout the universe, at least in theory, you'd need a gargantuan receiver to communicate effectively and you'd need an outrageous amount of energy to produce even a weak signal. Like AGN Fuel said, good old EM radiation would probably be way more effective.