Mr C. Gothic,

What you suggest is an interesting idea. It reminded me of a Carl Sagan
movie, can't remember the title. The movie was brilliant, but a really neat
idea. There were all these people working at some remote (Nevada desert?)
location, listening to the universe with their radio antennas (you know,
those huge parabolic dish type thingys).

They received a TV signal which was a broadcast of one of Adolf Hitler's (he
was an Austrian guy who became a German politician) speeches from 50 years
previous.

The idea was that the TV broadcast was of sufficient frequency as to have
penetrated the ionosphere (as current day sat band does) and had propagate
across space until it finally hit something, maybe a planet, and reflected
all the way back to Earth. (Of course, the signal may have reflected off
several other bits of space flotsam before hitting the right one to bounce
it back to Earth).

I suppose it's like looking in the sky at night at all the stars. Some of
them you see don't exist any more, but their light energy is finally
reaching Earth. Kind of a time machine really. Used to contemplate this sort
of stuff lots when I was 15 or thereabouts. Think about it until it scares
you.

Yes, a neat idea and interesting thread.

Mark.