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>>>>> "RC" == Robert Clark <rgregoryclark@xxxxxxxxx> writes:
RC> Telescopes can tune in to alien TV Public release date:
RC> 25-Oct-2006
RC> New Scientist "Radio telescopes designed to study the primordial
RC> universe could also eavesdrop on extraterrestrial civilisations
RC> similar to our own. 'By a happy accident,' says abraham Loeb of
RC> Harvard University, 'the telescopes will be sensitive to just the
RC> kind of radio emission that our civilisation is leaking into
RC> space.' "The next generation of radio telescopes are designed to
RC> pick up radio waves emitted by neutral hydrogen molecules in the
RC> early universe. These signals originally had a wavelength of 21
RC> centimetres, but the universe has expanded since they were
RC> emitted, stretching the waves in the process. Today, these signals
RC> have a wavelength of several metres, corresponding to a frequency
RC> of tens or hundreds of megahertz. 'This overlaps with our
RC> civilisation's radio emissions, which are in the range 50 to 400
RC> megahertz,' says Loeb."
RC> http://www.eurekalert.org/pub_releases/2006-10/ns-tct102506.php
Note that there has been some discussion of this topic over on
sci.astro.seti.
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