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Title: how does SETI pick up radio signals Post by: nec208 on May 27, 2007, 07:31:51 PM The biggest question is how does SETI pick up radio signals thousands or trillions of light years away? When most radio signals on eath only go no more than 30 miles.Like the thing if there where ET they would have to be 1000 times more Advance Title: Re: how does SETI pick up radio signals Post by: Orstio on May 27, 2007, 08:02:08 PM It's a very, very big antenna:
(http://universe-review.ca/I08-24-Arecibo.jpg) Title: Re: how does SETI pick up radio signals Post by: nec208 on May 28, 2007, 02:22:32 PM Any high frequencies use a big dishes.Do you remember the big dishes on the homes use to pick up TV programs.
Most walkie talkies are only good for 30 miles do to only 50 watts .I can pick up AM stations fom buffalo because of the trasmitting pwer AM stations put out. Well radio signals thousands or trillions of light years away is nothing people have done .At the most people have done is skip on frequencies below 30 MHz and that is sporadically . |