QUOTE(Rik13 @ May 1 2006, 12:56 PM) [snapback]1170087[/snapback]
why do we want to advertise the fact we are here. like one of the probes did in the early '70s, with maps of how to get here and what we look like etc.
You wouldn't put a sign on your door with "please come in everyone welcome" written on it. You may get mugged.
The voyager message was more a symbolic thing than anything else.
With radio technology slightly more advanced than our own, Homo sapiens is detectable out to a distance of roughly 50 light-years. Within that distance are about 5,000 stars, all of which have had the enviable pleasure of receiving terrestrial television.
Further,any extraterrestrials out there wanting to get in touch will be at least a century or two ahead of us. This means they will have already built the sort of space telescopes that can find and analyze planets around other stars. If life is commonplace (still a big “if”), then one can imagine that the appendixes of alien astronomy textbooks will contain long, long lists of worlds known to have biology. After all, for two billion years, the oxygen in the atmosphere has been whispering to the Galaxy that there’s life on Earth, because bacteria produced that oxygen. Without doubt, our planet will be on those textbook lists of “bio-worlds.”