What is the first radio signal sent by humankind?
February 21, 2011 8:08 PM Subscribe
What is the first radio signal sent by humankind and could it be understood by an alien race?
posted by smithsmith to science & nature (15 answers total) 2 users marked this as a favorite
I have been doing some reading on the topic of SETI
and in particular the Wow! Signal
and it got me thinking about the following:
1. If a similar "listening" project to SETI was set up by a distant alien race, what would be the Earth-generated "Wow! Signal"? I assume some sort of test broadcast from the late 19th century, but is there a definitive "first"?
2. Could signals from Earth be decoded? I notice that the Arecibo message
created by Carl Sagan et al, was sent in binary. Is such a broadcast easier to interpret than a radio broadcast of something like music or the human voice?