Unidentified flying object

An unidentified flying object, or UFO, in its most general definition, is any apparent anomaly in the sky that is not identifiable as a known object or phenomenon. Culturally, UFOs are associated with claims of visitation by extraterrestrial life or government-related conspiracy theories, and have become popular subjects in fiction. While UFOs are often later identified, sometimes identification may not be possible owing to the usually low quality of evidence related to UFO sightings (generally anecdotal evidence and eyewitness accounts).

Stories of fantastical celestial apparitions have been told since antiquity, but the term "UFO" (or "UFOB") was officially created in 1953 by the United States Air Force (USAF) to serve as a catch-all for all such reports. In its initial definition, the USAF stated that a "UFOB" was "any airborne object which by performance, aerodynamic characteristics, or unusual features, does not conform to any presently known aircraft or missile type, or which cannot be positively identified as a familiar object." Accordingly, the term was initially restricted to that fraction of cases which remained unidentified after investigation, as the USAF was interested in potential national security reasons and/or "technical aspects" (see Air Force Regulation 200-2).

UFO (disambiguation)

A UFO is an unidentified flying object, a popular term for any aerial phenomenon that cannot be identified.

UFO may also refer to:

Insects

Computer technology

Brands, clubs, organizations

Books

Film and television

U.F.O. (2012 film)

UFO (re-titled Alien Uprising in 2013) is a 2012 British science fiction film about an alien invasion, written and directed by independent British filmmaker Dominic Burns. It stars Bianca Bree, Sean Brosnan and Simon Phillips. It was Burns' third feature-length film as director, and his debut as writer-director.UFO was filmed in Crabtree Close, Allestree, Derby. The film has no relation to the 1970s TV series of the same name.

Plot

Five friends engage in a night of heavy drinking, fighting, and carousing at a club. Hung-over, they drunkenly stumble out of Robin's house, where they crashed for the night, and discover that nobody on their street has mobile phone service or power. They are confronted by an apparently deranged tramp who insists that they are in danger from people with a purple mark. When a city-sized spaceship hovers over Derby, the city panics and society begins to break down. Michael, a lieutenant in the SAS, attempts to lead his friends to safety. He is accompanied by his new girlfriend Carrie, whom he met the previous evening at a nightclub, his best friend Robin, Robin's fiance Dana, and Vincent. They make their way to a store where their friend Pete works, but it is closed. The group rescues an immigrant from angry thugs, and Pete allows the group in through the side entrance. However, a riot breaks out when the crowd sees them gathering supplies, and looters attempt to steal their groceries. Michael frightens off the looters with a pistol, and the friends head back to Robin's house.