What is an overview of Christian views on alien appearances and abductions?

[Alien abductions](https://en.wikipedia.org/wiki/Alien_abduction) , [close encounters](https://en.wikipedia.org/wiki/Close_encounter) and [UFO sightings](https://en.wikipedia.org/wiki/List_of_reported_UFO_sightings) have been widely reported by many individuals around the world. Many self-proclaimed alien abductees and first-hand eyewitnesses of close encounters have testified to this effect. For instance, the YouTube Channel [UFO HUB](https://www.youtube.com/c/UFOHub/videos) hosts multiple interviews with such people. But beyond eyewitness accounts and anecdotes, on a more serious note, the UFO phenomenon in particular has been deemed worthy of a more rigorous evaluation, as evidenced by the [Pentagon UFO videos](https://en.wikipedia.org/wiki/Pentagon_UFO_videos) and the [U.S. Intelligence UFO Report](https://en.wikipedia.org/wiki/UFO_Report_(U.S._Intelligence)) . What is an overview of Christian views on alien appearances and abductions? Do most Christian denominations and organizations tend to take an official position on this issue?