The Space Station captured a rare lightning phenomenon in space—sparking wild theories of UFO energy harvesting or secret alien tech.

NASA astronaut Nichole Ayers captured a stunning image of a rare red lightning phenomenon known as a “sprite” from the International Space Station on July 3. The jellyfish-shaped electrical burst was seen rising above a massive thunderstorm over Mexico and the southern U.S., including parts of California and Texas.

Sprites are large-scale electrical discharges that occur high in the mesosphere, triggered by positive lightning strikes.

Part of a group of upper-atmosphere events called Transient Luminous Events (TLEs), sprites are still not fully understood, despite decades of research.