unidentified aerial phenomenon

C12129
concept

An unidentified aerial phenomenon is any observed object or light in the sky whose nature, origin, or behavior cannot be readily explained by known aircraft, natural phenomena, or human-made technology.

Try in SPARQL

All labels observed (13)

Label Occurrences
UFO sighting 9
UFO incident 5
unidentified aerial phenomenon canonical 2

Description generation (CDg)

The one-sentence description above was generated by prompting gpt-5.1 with the class name and this instruction.

Instruction
generate a one-sentence description for a given conceptual class.
# Response Format
Return only the sentence: "Description: [one-sentence description of the conceptional class]"
Input
Class: unidentified aerial phenomenon
Generated description
An unidentified aerial phenomenon is any observed object or light in the sky whose nature, origin, or behavior cannot be readily explained by known aircraft, natural phenomena, or human-made technology.

Instances (18)

Instance Via concept surface
Shag Harbour, Nova Scotia, Canada
surface form: Shag Harbour UFO incident
UFO sighting
Westall, Victoria
surface form: Westall UFO sighting
UFO sighting
Phoenix Lights UFO sighting
Lights over Phoenix UFO sighting
Nimitz UFO incident UFO incident
Tic Tac
surface form: Tic Tac (UFO)
unidentified flying object
FLIR1 unidentified aerial phenomenon video
GoFast UFO incident UFO incident
1947 Roswell UFO incident UFO incident
1947 Kenneth Arnold sighting UFO sighting
1967 Shag Harbour incident UFO sighting
1966 Westall UFO sighting UFO sighting
1997 Phoenix Lights UFO sighting
2004 USS Nimitz incident UFO incident
2014–2015 USS Theodore Roosevelt incidents unidentified aerial phenomena incident
Hopkinsville Goblins incident of 1955 UFO incident
Trans-en-Provence
surface form: Trans-en-Provence UFO case
UFO sighting
UFOs —