This theory posits that UAPs are spacecraft piloted by extraterrestrial intelligences. The advanced capabilities observed in UAPs, such as extreme acceleration and maneuverability, could be explained by highly advanced alien technology. Proponents argue that the vast size of the universe makes the existence of other technologically advanced civilizations statistically likely.

This theory suggests that UAPs are manifestations of objects or entities from other dimensions or parallel universes. It draws on concepts from quantum physics and string theory, proposing that UAPs may be crossing over from alternate realities. This could explain their apparent ability to appear and disappear suddenly, as well as their seemingly impossible flight characteristics.

This theory proposes that UAPs are actually highly advanced, classified human technologies. Supporters argue that secret military projects could be decades ahead of publicly known technology. The theory suggests that governments or private corporations may be testing these revolutionary craft in real-world conditions, explaining the frequent sightings near military installations.

This theory suggests that some UAPs might be naturally occurring atmospheric phenomena involving plasma. It proposes that under certain electromagnetic conditions, plasmas could form in the atmosphere, creating luminous, rapidly moving objects. This could explain some of the light phenomena and erratic movements associated with UAP sightings.