Arecibo Observatory, radio-astronomy facility (completed 1963) located at Arecibo, PUERTO RICO; it is operated by Cornell University under contract with the U.S. National Science Foundation. Its fixed antenna of spherical section, 1,000 ft (305 m) in diameter, is the largest radio-telescope antenna in the world.
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Ed2K Links Site:
http://thegathering2.co.uk/portal.php

I HAVE A BLACK HOLE IN MY HEAD, I KEEP FORGETTING STUFF

i never heard of radio astronomy before,
can anyone explain to me?

thanks, after reading u'r message..
seems ihat it is more clear in my brain than before.
so what about a wave to detect ET?
It is the same?

Also try

http://www.obs-nancay.fr