Not sure if this is the right section or if this might be better off over at Cosmology... or...? So this is actually around a story concept I had, and while I would like to get the science as right as possible, I expect a certain amount of hand-waving to get past some of the difficult and difficult-to-explain points. Assume: Humanity has FTL travel. Assume: Alien (radio or other electonic) signal (microwave? probably not laser?) can be detected in space, and can be decoded to play back on human technology. How difficult is it to direction find an early radio signal in space? Would the signal still hold its data/coherency, say 1000 light years from its source? As technology advances, signal technology jumps from say radio, to microwave, to...? Are there other iterative steps I'm not aware of between those two? I recall reading radio travels at light speed, are there other transmission methods that travel slower (causing gaps in the communication)? Making smallish micro-jumps closer to the source, how hard would it be to find a related signal and reorient on its source? any advice and assistance appreciated. This is kind of my first post to wrap my head around the problem, which would help shape the story.