Neil Caliva wrote:
How far could our EM signals generated by humans be detected?
This was answered in the Q&A of the May/June 2005 issue of the "Planetary Report"; it says military EM signals could be detected out to about 50 light-years if the aliens used a dish the size the of the dish at Arecibo and most signals (like TV signals) could be detected out to 1 light-year or less with antennas similar in size to ours. However, an astrophysicist told me that we could be detected out to a few hundred light-years if we tried "really hard". But if the source signal is directional (most of the EM signals that travel furthest are) wouldn't that cause more complications? -- Since you would have to match the direction of the EM signal.
Jonathan ______________________________________________ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
