Satan is called the god of this world by St. Paul (2 Cor 4:4). The end of the world refers to the end of his reign and the beginning of Christ’s. But the Bible doesn’t talk about UFO’s in the modern sense. No sightings of shiny flying discs are recorded there, despite the broad interpretations by some.
I respect your opinion, however you have completely overlooked actual video evidence of alien visitation, as follows:
https://m.youtube.com/watch?v=6tZar4wRP40
It explains a lot!