# Is broadcasting the location of Earth to potential extraterrestial civilization regulated?

How many times have we broadcast the location of Earth to the outer space? Are there any regulation in doing so?

I know so far we have send the Arecibo Message, and any receiver can trace the message sender's direction by the direction with which the message is received. But have we ever pin point our exact location of the galaxy and send it as a message?

• I recall the Voyager spacecraft had a fairly specific description of our location. And early TV signals were arguably interstellar because of the power in their signals. Though they likely lost cohesion before going that far. In modern times not many signals go out that aren't intentional. It is too inefficient on energy and money to send an unfocused signal that can go interstellar. As an aside, that's one possible explanation to the Fermi paradox: other civilizations naturally advance to a point where they emit few to no detectable signals. – zibadawa timmy Nov 16 '14 at 19:18
• Hmm. don't think this is an astronomy question. Perhaps better at space? – Walter Nov 17 '14 at 16:14

• Assuming our aliens were familiar with television broadcasts they could probably hazard a guess at that and, in any case I think the answer to your question is no, as you are measuring the ratio of the signal strengths received at two points, and that is merely dependent on $r^{-2}$ surely? – adrianmcmenamin Nov 16 '14 at 21:17