The Importance of Distance in Space Exploration

The premise that the aliens are within eight light years was mainly selected because they're talking about leaked radio frequencies, right? So that's why they just assumed a close by star. And therefore they would never detect any of these attenuated signals. I don't care what technology they have. There's no way they're going to detect it. Assuming we want to wait, the centuries is going to take for the signals to even get to them. They may not be interested in civilizations which are telescope level. Bob might pass through a phase where we won't even think about using radio because it's like us trying to communicate using smoke signals. But it is interesting to think how detectable is the