Was ist das
Actually no, more like 80-100ly due to the first *useful* signals sent out into space around 1938.
Not sure if the Morse distress signal of the RMS Titanic actually got out that far.
Intriguingly the "event horizon" for signals from us was about 1998. After that the switch to digital and
other factors makes decoding a lot harder.
"Any sufficiently encrypted signal is indistinguishable from noise" comes to mind.
If an alien civilization is present around 40.86ly away they might pick up something and upon sending a starship powered by the Kugelblitz Drive (tm) pick up a strange dropout, conclude we'd been wiped out and move on to more interesting things.
On the other hand, if they have a jump drive or figured out how to harvest energy directly from space-time they might show up just to be sure.
Biting the hand that feeds IT
