A light traveling in the sky fast then disappearing happens all the time around my farm because it's dark & it's really easy to see meteorites burning up in the atmosphere.

As for not alone in the universe.......there is no way we are alone....there is a whole spirit world out there that we can't see, I believe there are angels & demons out there in that realm....alians from other planets I believe are tied with the spirit realm & don't think they are any different.