The Strange Atmospheric Phenomenon

It's hard to reconcile that someone who had a technology enabling them to conquer space and time, which is what you'd have to do in order to travel the sorts of distances we know are involved. What could they possibly need to learn about our planet by coming here that they couldn't already know? It's not impossible that we could be being visited,. or that tomorrow an alien spaceship could arrive in orbit around the earth and start talking to us. But overall, the interesting thing about this phenomena is trying to bring the science into it.