Let’s see, if we receive signals from some intelligent broadcaster,
the signals would have had to originate thousands of years previous to reception...
and what would have happened to that civilization in the “present” (gets weird when you deal in time and distance like this)...
doesn’t seem like a good use of time and resources.
“Let’s see, if we receive signals from some intelligent broadcaster,
the signals would have had to originate thousands of years previous to reception...”
Well, maybe not THAT far.
I remember when I was becoming a ham radio operator in 1958, there was a buzz about our first high power VHF signals, from the advent of television, would have reached the nearest star, 11 light years away, and the time was near that we might have some reply from a planet associated with that star. Just imagine someone on another planet seeing those old Amos and Andy films ;)
While I do listen to Kook-to-Kook AM, I am not one of the kooks, and I am an extreme skeptic that we are being visited, but I think it is fine that the world has a few big antennas and automatic scanning receivers looking into space. The cost is not that high.
How many watts would they have to transmit on an antenna how big for us to receive it from 1000 light years away?