How many civilizations are in existence “ right now”? Does “ right now” have any meaning at all when you factor in relativity?
Good point. "right now" to me means our time period - 2017. This means any detection right now pertains to a civilization that may have lived 1,000 years ago or 100,000 years ago depending on the distance. I don't think they will ever have a detection. I think the distances are simply too great and the probability of detecting one in our small window of time is just too small.