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“ufo”
UFO, unidentified flying object
Any light or object seen in the sky whose immediate identity is not apparent.
Despite unsubstantiated claims, there is no evidence that UFO's are alien spacecraft. When investigated, the vast majority of sightings turn out to have been of natural or identifiable objects, notably bright stars and planets, meteors, aircraft, and satellites, or to have been perpetrated by pranksters.
This entry is located in the following unit:
Astronomy and related astronomical terms
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