Ask Dr. SETI ®
I have heard that some folks had done an analysis that showed that all the radio energy that we are currently pumping into space is actually thermalizing to noise within a few light-years. What are your thoughts about this?
Gerry (via email)
The Doctor Responds:
There have been some good studies that show that our UHF TV broadcasts spread sufficiently that the video cannot be decoded over interstellar distances. But, since most of the energy is in the video carrier, and it's essentially CW, and the Drake-Helou limit still applies, I conclude that the hallmark of artificiality is still evident, even if the programming content (which I argue is not a manifestation of intelligence in any case) is lost in the journey.
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this page last updated 22 March 2008
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