A glowing green ball of light appeared in the sky in Japan this week, baffling experts as to what it actually is.
The orb was captured hovering over Niigata, northern Japan, in the early hours of Monday morning.
This footage shows the green light shooting diagonally across the sky as sparks fly from the tail of it.
The incident has caught the attention of scientists, who have yet to determine what the UFOis.
One astronomer told NBC News that it was probably a bright meteor, known as a fireball.
But they did mention that it could be a piece of space debris that burnt up as it entered the atmosphere, such as a satellite.
It has divided opinion, as one UFO investigator claims it was actually aliens entering Earth's space.
Scott C Waring of UFO Sightings Daily claims the object is an alien space craft trying to disguise itself as a meteor.
YouTube / Suzuki KoHiroshi
He said that the glowing light was an alien, claiming that meteors don't glow green and that the curve of its flight was too straight to be a fireball.
The actual origins of the green ball of light haven't yet been identified.