From: Ray Dickenson <r.dickenson.nul> Date: Mon, 16 Jul 2012 08:13:46 +0100 Archived: Mon, 16 Jul 2012 10:47:03 -0400 Subject: SETI History Hello List, In his essay 'A Mirror in the Sky - The Drake Equation' Oliver Morton gives some details of the history of SETI and the characters involved: [Quotation Begins] SETI had started as a radio-astronomy project because Morrison, Cocconi and Drake had seen that radio astronomy provided the only way that a civilization such as ours could be detected by another civilization such as ours. <snip> The technicalities of SETI were thus technicalities of radio astronomy, such as the choice of appropriate frequencies ... and signalling strategies. The difference between type I and type II civilizations, for example, was basically a difference in the power of their radio transmitters, and a difference in the strategies that would be suitable for detecting them. (From around the time of the Byurakan conference Drake himself becsme increasingly interested in type IIs - supercivilizations - and in 1974 he and Sagan mounted a search for them. ...they used the newly refurbished Arecibo radio telescope, a vast bowl in the hills of Costa Rica. Instead of looking at individual stars they looked at whole galaxies, simultaneously sampling the emissions of billions of far-off stars on the basis that what the supercivilizations lacked in numbers they would make up for with the sheer power of their beacons.) [Quotation Ends] There you have it - as many of us have said, by default SETI was initiated to look for primitives - like us. And even when Drake and Sagan took an interest in advanced civilizations they imagined the only difference would be a matter of scale. Admittedly it's hard to see into the future, but history tells us that the difference from one era to the next always involves change of paradigm: doing things in entirely different ways - as technology allows. So if we're really looking for advanced civilizations we shouldn't expect them to still be using radio. Cheers Ray D Listen to 'Strange Days... Indeed' - The PodCast At: http://www.virtuallystrange.net/ufo/sdi/program/ These contents above are copyright of the author and UFO UpDates - Toronto. They may not be reproduced without the express permission of both parties and are intended for educational use only.
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