:Category:Unidentified flying objects
{{Commons cat|UFOs}}
{{Cat main}}
{{Cat see also|Alleged extraterrestrial visitation}}
All articles related to unidentified flying objects (UFOs), also known as unidentified aerial phenomena (UAPs), a general term for all kinds of mysteriously unexplained, anomalous objects or entities allegedly seen floating in the sky.
Despite many mundanely rational and skeptical explanations, many proponents of UFO conspiracy theories and urban legends have frequently alleged UFOs to be extraterrestrial spacecraft piloted by alien visitors, or other paranormal/supernatural phenomena, and this association carries over into modern popular culture and works of fiction.
Category:Alleged extraterrestrial visitation
Category:Atmospheric optical phenomena
Category:Legendary flying machines