>To this end a galactic neighborhood scenario and model is defined. It explains why a stealth ETV probe equipped with artificial intelligence (AI) has been built by an exo-civilization and sent in a historical past into our solar system. It states that this extraterrestrial visitation probe (ETVP), now orbiting the earth, occasionally sends a stealth electromagnetic beam (SEMB) down into the atmosphere. It explains in detail how such an SEMB produces luminous UAPs by means of a nonlinear photonic mechanism which, as such, has been known and investigated since 1995 as a branch of current femtosecond physics

Intriguing new paper suggests UAP phenomena may be plasma holograms from an extraterrestrial monitor orbiting Earth. Doesn't seem totally crazy to me. The Hessalden lights really do look like someone doodling with plasma (pic related).

https://www.researchgate.net/publication/288389376_Unidentified_Aerial_Phenomena_UAP_A_New_Hypothesis_toward_Their_Explanation