Unidentified Flying Object

An unidentified flying object, often abbreviated UFO or U.F.O., is an unusual apparent anomaly in the sky that is not readily identifiable to the observer as any known object, often associated with extraterrestrial life or government-related conspiracy theories.

Read more about Unidentified Flying Object:  Terminology, Studies, Early History, Investigations, Identification of UFOs, Extraterrestrial Hypothesis, Associated Claims, Ufology, Conspiracy Theories, Famous Hoaxes, In Popular Culture

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    —Monty Python’s Flying Circus. Monty Python’s Flying Circus (TV series)

    ...if we would be and do all that as a rational being we should desire, we must resolve to govern ourselves; we must seek diversity of interests; dread to be without an object and without mental occupation; and try to balance work for the body and work for the mind.
    Ellen Henrietta Swallow Richards (1842–1911)