4 ms·
Let's see: Our galaxy is what, rough ballpark 100,000 light years (LY) in diameter. Soooo, to have a reasonably large collection of aliens to detect us, ask t
by graycat 3y ago
Let's see: Our galaxy is what, rough ballpark 100,000 light years (LY) in diameter. Soooo, to have a reasonably large collection of aliens to detect us, ask that they be ~50,000 LY or so away. Soooo, by now all they could get from us would be from what we were doing ~50,000 years ago. But we've been radiating from our civilization only in the last ~200 years.
Net, the aliens would have to wait ~50,000 years to receive anything very interesting from us. Sooo, have they detected us yet? Likely not. Instead they will have to wait another ~50,000 years.
And even if alien ET (extra terrestrial) has found how to travel and signal faster than light, OUR signals, what WE have sent, will still travel only at the speed of light.