Thank you all for the replies.I found this about VLA:
The VLA is an interferometer, which means that the data from each antenna can be combined electronically so that the array effectively functions as one giant antenna.
Then, as Vanadium said, it would effectively be of a large surface area...
Hi,
I read the following on seti.org:
"Our earliest TV broadcasts have reached several thousand nearby stars, although any alien viewers would have to build a very large antenna (thousands of acres in size) to detect them."
I guess that signals have got very weak...( does it mean...