[OT] 47 year old television signals bouncing back to Earth

[James Knott]

Robert Brockway wrote:
> I've read on various science sites that physicists now think that TV & 
> radio signals eminating from Earth degrade beyond recognition well 
> before they get to even Alpha Centauri.

Signal strength decreases with the square of distance and eventually 
reaches the point where it's below the noise level and unrecoverable.  
High gain antennas can reduce, but not eliminate this.


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