- #1
newjerseyrunner
- 1,533
- 637
In 1974 we sent a signal out towards a cluster of stars 25,000 light years away at a power of 1000kW. If we had been on the receiving end of that signal, would we have been able to detect it? Basically if you could have two identical Arecibo observatories, what's the maximum range in which they could talk to each other?