SIGNALS FROM THE PAST
Many years ago there was several reports of signals being heard that was years old but dismissed as impossible due to the fact that we only understood RF to expand and drop off at the inverse square law.....Now we can produce light and RF in a parallel form with no loss opens up a new thinking on the matter...
The word PATH LOSS is only due to the defect in a di-pole radiation pattern near field effect and capture area "NOTHING WHAT SO EVER TO DO WITH LOSS THROUGH THE AIR".
If you send out a beam of RF due to gravity of the universe it will bend and at some point return to the original point the only attenuation in all that journey would be solar dust or gases so it would sound a little bit wobbly and that was the reports I can remember.....