Sal M. Onella wrote:
There certainly is something termed galactic noise and most of
it has apparently been ricocheting around the cosmos all this time. It was
first discovered by Bell Labs scientists using a supercooled microwave
amplifier whose noise was higher than expected. They covered the feedhorn
and lo! ... The noise dropped!

http://www.amsat.org/amsat/archive/a.../msg00336.html retells
part of the story.

Yes, that's what the TV documentary was all about.

There's no way any of us will be affected by galactic background, however,

The same TV documentary said that 1/2 of one percent
of the noise on a blank TV screen is caused by background
radiation from the Big Bang. I was reporting what they
said, not what I had measured.
--
73, Cecil http://www.w5dxp.com