Apparently Voyager has left the Solar System. I don’t know who gets to decide that, or how, or exactly what demarcation line you use, but it’s out there. 11 billion lmiles out, or 17 light-hours:
NASA gets to decide. Voyager has been measuring many things as it travels and they’re monitoring to see how far out the various influences of the sun reach.
From the article, the probe passed the limit of the solar wind in 2004. (Well, the straight portion - there were turbulent solar particles farther out.) It’s now in a transition zone which they think marks the edge of the sun’s magnetic influence. Per the article, they’re near, but not yet in interstellar space.
I haven’t seen how long they estimate that it can continue, but they’re still hearing both of them. That has got to be one dwindlingly small signal by now. Well, two dwindlingly small signals.
This will end badly, mark my words. We shouldn’t do anything to tell them we are here until we are capable of defeating them if they decide to come knocking.