HAZZARD, you are assuming that any aliens that may be coming here, just stumbled accross us or our transmissions. You are overlooking many things. First off, like us they may have telescopes, and unlike us..so far.. they may have had the ability to peer at planets from hundreds, perhaps thousands of lightyears away, if not more.
That depends on what you mean by peering at our planet. They might be able to detect that there indeed is a planet and if they are really, really good they can even detect that it has an atmosphere that can sustain life. Looking at features on earth would be a stretch, even for them.
And isn't it viewed that our kind of planet is relatively rare.. so would it be an accident that they would be coming here.
Uhm, I don't think anybody actually knows how rare our planet is.
Earth has been here for billions of years. If an alien race did find us, isn't it logical they would share what they found with others, who then would also come to chek us out.
The biggest UFO wave occured in the sixties, almost a full 20 years after the detonation of the first atomic bomb. Perhaps it emitted particles that travel much faster than light, that we have yet to discover, that they can detect.
Ehm, I would most certainly disagree with nuclear detonations being the cause of that. First of all, I would suspect scientists would have theoretized/discovered such particles by now. But even more importantly, the sun is essentially one big nuclear fusion process, so even the biggest nukes we could set off here on Earth would be completely masked by those of the sun.