UFO
Unexplained aerial phenomenon
UFO stands for unidentified flying object—anything in the sky that observers cannot immediately explain.
The term emerged from military and aviation contexts but became associated with alleged alien spacecraft: She claims to have seen a UFO over the desert.
Most reported UFOs turn out to be aircraft, satellites, weather phenomena, or hoaxes.
The official term has shifted to UAP (unidentified aerial phenomenon), but UFO remains dominant in casual use.
Gaseous layer around planets
- cloudsAirborne water masses
- horizonApparent earth-sky meeting
- aviationFlying or operating aircraft
- aircraftAirborne transportation vehicle
balloon · weather balloon · flight · hover · luminous · nocturnal · lights · orb
Disc-shaped alien vehicle
- diskFlat circular object
- craftSkilled manual art
- mothershipPrimary vessel carrying others
- propulsionForce driving movement forward
antigravity · warp · interstellar · technology · reverse engineering · hull · porthole · landing
Hiding wrongdoing from public
- governmentAuthority over a state
- RoswellNew Mexico city, UFO-famous
- Area 51Classified Nevada test facility
- disinformationIntentional deceptive falsehoods
Men in Black · secrecy · classified · whistleblower · black ops · redacted · disclosure · suppression
Beyond natural explanation
- unexplainedNot yet clarified
- mysteriousBeyond easy comprehension
- cryptozoologyPursuit of unproven creatures
- Bermuda TriangleLegendary Atlantic danger zone
crop circles · cattle mutilation · ancient astronauts · interdimensional · phenomena · otherworldly · strange · bizarre
One who saw events
- encounterUnexpected meeting or confrontation
- reportFormal written findings
- testimonySworn statement as evidence
- observationAttentive watching or remark
documentation · recording · phenomenon · unexplained · anomaly · luminous · nocturnal · fleeting
Being from outer space
- abductionUnlawful seizure of person
- E.T.Extraterrestrial being
- lifeformAny living organism
- GreysSupposed alien species
Nordics · contactee · implant · telepathy · first contact · humanoid · probe · visitation
Quest for cosmic signals
- astrobiologyStudy of cosmic organisms
- exobiologyStudy of cosmic life
- panspermiaLife spreads via space rocks
- Fermi paradoxWhy no extraterrestrials yet?
Drake equation · ufology · investigation · analysis · hypothesis · evidence · skepticism · scientific
atmosphere
Gaseous layer around planets
aircraft · balloon · weather balloon · flight · hover · luminous · nocturnal · lights · orb · disk
flying saucer
Disc-shaped alien vehicle
- diskFlat circular object
- craftSkilled manual art
- mothershipPrimary vessel carrying others
propulsion · antigravity · warp · interstellar · technology · reverse engineering · hull · porthole · landing · beam
cover-up
Hiding wrongdoing from public
- governmentAuthority over a state
- RoswellNew Mexico city, UFO-famous
- Area 51Classified Nevada test facility
disinformation · Men in Black · secrecy · classified · whistleblower · black ops · redacted · disclosure · suppression · debunking
supernatural
Beyond natural explanation
- unexplainedNot yet clarified
- mysteriousBeyond easy comprehension
- cryptozoologyPursuit of unproven creatures
Bermuda Triangle · crop circles · cattle mutilation · ancient astronauts · interdimensional · phenomena · otherworldly · strange · bizarre · eerie
eyewitness
One who saw events
- encounterUnexpected meeting or confrontation
- reportFormal written findings
- testimonySworn statement as evidence
observation · documentation · recording · phenomenon · unexplained · anomaly · luminous · nocturnal · fleeting · credible
extraterrestrial
Being from outer space
Greys · Nordics · contactee · implant · telepathy · first contact · humanoid · probe · visitation · mothership
SETI
Quest for cosmic signals
- astrobiologyStudy of cosmic organisms
- exobiologyStudy of cosmic life
- panspermiaLife spreads via space rocks
Fermi paradox · Drake equation · ufology · investigation · analysis · hypothesis · evidence · skepticism · scientific · researcher
- space stuffalien, meteor, comet, asteroid, black hole
- Alien Invasionflying saucers, death rays, tripods, ray guns, war machines
- Extraterrestrialsalien, aliens, extraterrestrial, ET, flying saucer
- future vehiclesflying car, hovercraft, hoverboard, jetpack, spaceship
- sci-fi techteleporter, time travel, cryonics, force fields, time machine
- space fictionscience fiction, spaceship, sci-fi, astronaut, space adventure
Airborne meteorology instrument platform
airplane · helicopter · drone · satellite · swamp gas
- UFO sightingsReported observations of unidentified craft
- UFO cover-upHiding evidence of spacecraft
- UFO hunterSeeks unidentified aerial phenomena
- UFO documentariesFilms about unidentified craft
- UFO phenomenaUnidentified flying object events