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Message: <blockquote data-quote="Channel Hopper" data-source="post: 982259" data-attributes="member: 175144">Not sure why you say that, short wave (or at least frequencies from 15MHz upwards) have been used by space agencies for communication. Sputnik had a 20 (.005) MHz oscillator on board for the characteristic 'beep beep'.Once the plans are in place for long distance mining, autonomous exploration and possibly colonising, I can see that there will be a requirement forexploiting the low frequencies over such long distances, and eventually moving away from electromagnetic communication completely, using the medium of gravity waves, where the speed of light no longer becomes a constraint.</blockquote>