|MadSci Network: Astronomy|
Is it reasonable to assume that radio or TV broadcasts could be picked up at a distance of, say, fifty light years by a civilization scanning the heavens with their own SETI program? Electromagnetic interference is generated on the planet by thunderstorms, geomagnetic storms, and such. The signals have to make it past the ionosphere and radiation belts. Then there is radio pollution by the Sun and by Jupiter. The attenuation caused by the inverse square law would do the rest. Is the premise of Sagan's _Contact_ a reasonable one? Could the ET's separate the signal from the noise?
Re: Will radio/TV signals from Earth reach the nearer stars?
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