What if any messages from the outer galaxy/universe...
were being sent on frequencies that would be roughly called "subspace" for the sake of putting a ST term to them.
I was briefly watching "Contact" the other day and thought about the possibility that any "outside" contact was of such that only a really advanced civilization, even beyond our own, would have the technology to detect the "alien" signals. This planet could still be at least decades away from developing a system of communication that would be able to not only detect, but broadcast return signals that may already be bombarding us, from the outer universe at this time.
I suppose that if the signals were arriving at "Faster than Light" speeds with frequencies that we could not detect, research will continue to only record "static" from stars for quite some time.