Newsi8 has read many UFO reports. Here, for education and amusement, is a very long list of things we have noted which have been reported as UFOs in some kind of a report somewhere.
- 3D projection mapping displays
- Accelerator artifacts in particle physics experiments
- Active active denial systems (long-range crowd control)
- Active atmospheric stability modulation systems
- Active camouflage military vehicles
- Active camouflage technology demonstrations
- Active camouflage underwater vehicles
- Active collision avoidance system lights
- Active disturbance cancellation systems
- Active drone noise cancellation systems
- Active hydrodynamic flow control systems
- Active infrared countermeasures
- Active nautical charting systems
- Active noise cancellation systems
- Active protection systems for military vehicles
- Active sensor jamming systems
- Active sonar stealth detection systems
- Active sonar systems
- Active underwater acoustic camouflage systems
- Active underwater camouflage systems
- Active underwater electrostatic field camouflage systems
- Active underwater magnetic field cancellation systems
- Active underwater sound absorption
- Active underwater stealth detection systems
- Active vapor wake detection
- Active vibration control systems
- Active wind shear detection systems
- Adiabatic invariants in electromagnetic fields
- Advertising banners
- Aerial erosion seeding experiments
- Aerodynamic contrails
- Aerodynamic tube wind tunnel testing
- Aerostat surveillance systems
- Air bubbles in water surfaces causing reflections
- Air cannons used in concerts
- Air circulation patterns
- Air conditioner lights
- Air pollution
- Air show aerobatics
- Air traffic control errors or misidentifications
- Airboat lights
- Airborne debris
- Airborne drones with lights
- Airborne pollen
- Airborne refueling techniques
- Airburst meteor phenomena
- Aircraft communication beacon signals
- Aircraft contrails
- Aircraft formation aerobatics
- Aircraft vortex distortions
- Aircraft vortex wake turbulence
- Airplane advertising signs
- Airplanes
- Airplanes (civilian or military)
- Airport runway lights
- Airship advertisements
- Airships or blimps
- Alien-themed balloons or decorations
- Alternative universes bleeding into our reality, creating visual anomalies
- Amateur radio signals
- Amateur rockets
- Amphibious remote controlled robots
- Amusement park rides
- Ancient alien artifacts reactivating and emitting unidentified lights
- Ancient curses awakening extraterrestrial beings with UFO-like appearances
- Ancient gods returning to Earth in chariots of fire
- Animal behavior anomalies
- Animal migrations or flocks
- Animated light displays
- Anomalous reflection or deflection of radio waves
- Antenna interference
- Anthropogenic electromagnetic signals
- Art installations
- Artificial aurora experiments
- Artificial gravity experiments
- Artificial intelligence probes sent by a highly advanced alien civilization
- Artificial light sources
- Artificial satellites
- Astral projection or out-of-body experiences (subject to skepticism)
- Astral projection phenomena causing unexplainable aerial anomalies
- Astronomical artifacts
- Astronomical events
- Astronomical instrument artifacts
- Astronomical mirages
- Astronomical observatories or telescopes
- Astronomical phenomena
- Astronomical phenomena (auroras, comets)
- Atmospheric anomalies (light refractions, mirages)
- Atmospheric anomalies caused by seismic activity
- Atmospheric audio phenomena
- Atmospheric debris
- Atmospheric disturbances (gravity waves, atmospheric waves)
- Atmospheric disturbances caused by earthquakes
- Atmospheric disturbances caused by volcanic eruptions
- Atmospheric electricity
- Atmospheric fluctuations
- Atmospheric ghosts
- Atmospheric inversions
- Atmospheric mirages
- Atmospheric mirroring effects
- Atmospheric moisture or fog
- Atmospheric phenomena (unspecified)
- Atmospheric pollution (unspecified)
- Atmospheric pollution as smog
- Atmospheric pressure disturbances
- Atmospheric pressure fronts or zones
- Atmospheric pressure-induced plasma emission
- Atmospheric refractions
- Atmospheric temperature inversions
- Atmospheric temperature inversions in water bodies
- Atmospheric turbulence or eddies
- Atomic absorption light sources
- Atomic emission light sources
- Attosecond laser pulses
- Augmented reality simulations projected into the sky
- Aurora australis
- Aurora borealis misinterpretations
- Aurora sightings
- Autonomous underwater hydrothermal exploration vehicles
- Autonomous underwater marine life surveys
- Autonomous underwater mine sweeping vehicles
- Autonomous underwater oil spill detection vehicles
- Autonomous underwater pipeline inspection vehicles
- Autonomous underwater research gliders
- Autonomous underwater scientific research vehicles
- Autonomous underwater vehicles
- Autonomous underwater wreck exploration vehicles
- Avalanche flares
- Ball lightning
- Ballistic missile tests
- Ballistic missile launches
- Balloon light displays
- Balloon parachutes for experiments
- Balloon releases or launches
- Balloon-based space photography
- Balloon-launched high altitude photography
- Balloon-powered cameras
- Balloon-powered social campaigns
- Balloons
- Balloons filled with bioluminescent algae
- Balloons with LED lights
- Bat colony migratory routes
- Bats
- Beamforming antenna arrays
- Beings with extraordinary psychic and telekinetic powers
- Bi-static radars
- Bicycle light patterns
- Billboard displays
- Bioelectrochemical sensor readings
- Biological bat monitoring systems
- Biological substances or organisms in the air (pollen, spores)
- Bioluminescent organisms
- Bird flocks
- Birds
- Birds or other flying animals
- Birds-of-prey kite deterrent systems
- Bistatic radar cross-section measurement
- Bizarre light reflections due to retroreflective materials
- Black hole accretion disks
- Blimps
- Blinding effects from camera flashes
- Blown transformer sparks
- Blown-up garbage bags
- Boat navigation lights
- Bright chromium objects reflecting sunlight
- Bright city lights reflecting off clouds
- Bright stars
- Building floodlights
- Buoy lights in bodies of water
- Buoy-launched underwater drones
- Camera artifacts
- Camera lens distortion
- Camera malfunctions
- Camera strap movements
- Captive aircraft population control
- Captive insect swarm monitoring systems
- Captive pigeon racing formations
- Captive surface-level marine debris removal
- Captive surface-level oil spill recovery systems
- Captive underwater archeological site preservation systems
- Captive underwater coral reef restoration systems
- Captive underwater telecommunications cable protection systems
- Car alarms with flashing lights
- Car brake lights
- Car headlights
- Car headlights on foggy nights
- Car lights
- Car taillights
- Cargo parachutes
- Cargo planes with strange lights
- Cargo ship navigation lights
- Celestial alignments with artificial structures
- Celestial bodies (stars, planets, meteors)
- Celestial events
- Celestial messengers visiting Earth to deliver spiritual messages
- Celestial reflections
- Celestial reflections on a body of water
- Cell tower lights
- Cellphone screen lights
- CERN experiments triggering gateways to parallel dimensions
- Charge-coupled device detector anomalies
- Chemical releases or contrails from aircraft
- Chill winds from thunderstorms
- Chinese lanterns
- Christmas light displays
- City lights
- City skyline reflections
- Civilian aircraft
- Cloaking devices malfunctioning and revealing unidentified aircraft
- Cloud formations
- Cloud seeding or weather modification operations
- Cloud seeding with silver iodide aerosols
- Club spotlight shows
- Coherence tomography artifacts
- Collapsing wave functions causing localized disturbances in spacetime
- Collective consciousness experiments causing mass hallucinations of UFOs
- Colliding insect swarms
- Combustion gases from engines
- Comet tails
- Comets
- Commercial aircraft
- Communication interference from electromagnetic sources
- Concert laser shows
- Condensation trails (contrails)
- Contrails (illuminated)
- Controlled atmospheric beam steering experiments
- Controlled atmospheric deflection experiments
- Controlled atmospheric diffraction experiments
- Controlled atmospheric electromagnetic pulse experiments
- Controlled atmospheric lensing effects
- Controlled atmospheric microwave transmission experiments
- Controlled atmospheric plasma discharges
- Controlled atmospheric refraction techniques
- Controlled atmospheric scattering techniques
- Controlled atmospheric scintillation techniques
- Controlled atmospheric temperature inversions
- Controlled atmospheric turbulence experiments
- Controlled atmospheric waveguiding experiments
- Controlled fogging systems for mosquito control
- Controlled harmonic guide lighting systems
- Controlled streetlight dimming experiments
- Controlled underwater sound propagation tests
- Coronal mass ejections’ radio waves
- Cosmic consciousness awakening in humans, allowing perception of UFOs
- Cosmic rays interacting with the atmosphere
- Cosmic string theoretical predictions becoming observable anomalies
- Cosmological redshifts and blueshifts discrepancies
- Cosmonaut or astronaut activity
- Covert atmospheric refractive manipulation experiments
- Cryptographic laser communication experiments
- Crystal chandelier reflections
- Cultivation lights
- Cultural or religious lanterns
- Cyclotron resonant scattering feature misinterpretations
- Damaged or faulty instrument panels on aircraft or spacecraft
- Dark clouds reflecting city light pollution
- Dark flight phenomenon in nanoparticles
- Debris from space launches
- Decoys or flares deployed during military exercises
- Deployed acoustic surface wave transducers
- Deployed active seafloor mapping sonars
- Deployed bioluminescent plankton observation sensors
- Deployed bioremediation agents in clouds
- Deployed bottle-nosed dolphin decoys
- Deployed co-located underwater seismic sensing arrays
- Deployed hydroacoustic tracking systems
- Deployed jellyfish-like aquatic turbines
- Deployed marine mammal detection sonar
- Deployed micro weather sensors
- Deployed moored weather station buoys
- Deployed radio frequency chaff
- Deployed side-scan sonar surveys
- Deployed sonar buoys for oceanographic studies
- Deployed tethered satellite systems
- Deployed tidal barrage energy extraction systems
- Deployed tidal power generation systems
- Deployed tidal stream energy converters
- Deployed tide level measurement sensors
- Deployed underwater acoustic navigation systems
- Deployed underwater seismic data loggers
- Deployed underwater sewage treatment sensors
- Deployed wave energy converter buoys
- Deployed wave monitoring buoys
- Desert mirages
- Diffraction in optical systems
- Diffuse reflections from large bodies of water
- Digital glitches
- Digital manipulation in photos/videos
- Digital noise
- Digital sensor artifacts
- Discarded reflective objects on the ground
- Disoriented or lost aircraft
- Dispersed chemical tracers
- Dispersion phenomena in crystals
- Displaced airglow by upper atmospheric waves
- Distant bonfire smoke
- Distant celestial objects
- Distant radio tower lights
- Distant thunderstorm lightning
- Distorted foil balloons
- Distorted light emission from photovoltaic cells
- Distorted or damaged camera sensors
- Distorted radio signals or communication glitches
- Distorted reflections in water caused by waves
- Drogue-deployed underwater artifacts detection
- Drone light shows
- Drone shows
- Drone swarms for agricultural spraying
- Drones
- Dual-color airplane navigation lights
- Dual-frequency signals from ionospheric interactions
- Dust devils
- Dust particles
- Dust storms
- Early testing of supersonic aircraft
- Earth ionosphere cavity resonances
- Earth-based gamma-ray flashes
- Earth-ionosphere cavity wave transmission
- Earth-ionosphere waveguide eigenmodes
- Earth’s plasma radiation belts disturbances
- Earthquake lights
- Ectoplasmic phenomena caused by paranormal activity
- Electric arcs in high-voltage power lines
- Electric charge in the air
- Electric field effects in thunderstorms
- Electric powered parasailing karts
- Electric sparks due to wear and tear
- Electric surface waves on oceans
- Electrical discharges from cloud-to-ground lightning
- Electrical discharges in the atmosphere
- Electrical disturbances
- Electrical failures in planes
- Electrical storms
- Electro-luminescent displays
- Electro-optical sensors’ artifacts
- Electrochromic glass reflections
- Electrohydraulic wave generation experiments
- Electromagnetic interference
- Electromagnetic interference from mobile devices or radios
- Electromagnetic interference from power lines or devices
- Electromagnetic pulses or atmospheric discharges
- Electromagnetic radiation from power generating facilities
- Electromagnetic radiation from transmission towers or radio stations
- Electronic countermeasures used in military exercises
- Electronic warfare systems
- Electrostatic discharges from power lines
- Electrostatic levitation experiments
- Emergency flare drops
- Emergency flares
- Emergency lighting systems in buildings
- Emergency vehicle lights
- Emissions from factories
- Engine or turbine exhaust plumes
- Entities from the spirit realm manifesting in physical form
- Experimental air pollution control systems
- Experimental aircraft
- Experimental aircraft or prototypes
- Experimental propulsion systems generating unknown visual effects
- Extraterrestrial civilizations conducting covert surveillance missions
- Extraterrestrial communication tests
- Falling foliage or leaves
- Falling objects
- False color imaging artifacts
- False memories
- Faraday effect anomalies
- Fata Morgana mirages
- Fata morgana or superior mirages
- Faulty camera equipment
- Faulty camera sensors
- Faulty circuitry in electronic devices causing light emission
- Faulty electrical wiring
- Faulty equipment
- Faulty GPS tracking devices
- Faulty neon sign transformers
- Faulty or counterfeit electronic components affecting radar readings
- Faulty or malfunctioning aircraft lights
- Faulty or malfunctioning radar equipment
- Faulty or malfunctioning weather instruments
- Faulty or misaligned optical tracking systems
- Faulty or misconfigured cameras
- Faulty radar equipment
- Faulty radar or tracking systems
- Faulty telescope optics
- Faulty video analysis
- Fiber optic gyroscope anomalies
- Fiberglass debris
- Fire alarm strobe lights
- Fire ants reflecting sunlight
- Fire control radar
- Fire department flares
- Fire extinguisher propellant discharge
- Fire reflection or smoke plumes interacting with atmospheric conditions.
- Fire reflects in water surfaces
- Fire suppression systems testing
- Fireballs
- Fireballs or bolides
- Firefighter helmet lights
- Firefighters’ training exercises
- Firefighting planes or helicopters dropping retardant or water
- Firefighting planes or helicopters with bright lights
- Fireflies
- Fireflies or bioluminescent organisms
- Firework smoke trails
- Fireworks
- Fireworks displays
- Fireworks displays at events
- Fisheries hydroacoustic surveys
- Fixed-wing aircraft
- Flares
- Flashes caused by explosions or fireworks
- Flashes from communication towers
- Flashes from satellites
- Flashing aircraft beacons
- Flashing car lights
- Flashing warning lights on tall buildings
- Flashlights
- Flashlights during night hikes
- Flickering electronic billboards
- Flickering streetlights
- Floating debris on water bodies
- Floating lanterns released during ceremonies
- Flock of bees or other swarming insects
- Flocks of birds
- Flocks of migrating bats
- Fluorescent light malfunctions
- Fluorescent lights in industrial buildings
- Fluttering plastic sheets
- Fluttering satellite panel deployments
- Flying animals
- Flying toys
- Focused solar power systems
- Focused sound beam effects
- Foggy breath condensation reflecting light
- Foggy conditions
- Freight train lights
- Galaxy cluster spectroscopy artifacts
- Gamma-ray burst afterglows
- Gamma-ray bursters’ emissions
- Gamma-ray detectors’ background noise
- Geese in formation
- Geological or natural formations (rock formations, ice formations)
- Glare
- Glider flare drops
- Glider lights
- Gliders
- Gliders or sailplanes
- Gliding birds
- Gliding sports activities
- Glint or reflection from metal surfaces (vehicles, buildings)
- Glitter particles in the air
- Glow worms
- Glowing algae or bioluminescence in bodies of water
- Glowing fungi
- Glowing marine organisms
- Glowing plasma phenomena
- GPS anomalies
- Gravitational lenses
- Gravitational wave effects
- Gravitational wave detection experiments
- Green flashes
- Ground metallic objects reflecting light
- Ground testing of aircraft
- Ground-based aircraft navigation lights
- Ground-based drone light shows
- Ground-based holographic projections
- Ground-based laser communication systems
- Ground-based laser experiments or tests
- Ground-based laser pointers
- Ground-based laser security systems
- Ground-based laser shows
- Ground-based observatory laser beams
- Ground-based telescopes
- Group hallucinations or mass hysteria
- Guided missiles or projectiles
- Guided tour groups with light-emitting devices
- Gymnasium LED displays
- Haarp antenna arrays
- Halo effects around lights
- Harbor navigation lights
- Heat lightning
- Helicopter electronic countermeasure systems
- Helicopter landing lights
- Helicopter searchlights
- Helicopters
- Helioseismic waves
- Heliospheric imager artifacts
- Helium balloon releases
- Hereditary optical misperceptions
- HID (High-Intensity Discharge) lamps anomalies
- Hidden celestial objects behind structures
- Hidden metallic surfaces reflecting light
- High altitude supersonic airships
- High-altitude airships
- High-altitude balloons
- High-altitude chemical releases
- High-altitude or stratospheric airship tests
- High-altitude or stratospheric balloons
- High-altitude research balloons
- High-altitude surveillance balloons
- High-altitude weather balloons
- High-energy neutrino interactions in the atmosphere
- High-power military lasers
- High-power searchlights
- High-speed train lights
- Higher-dimensional beings manifesting as unidentified flying objects
- Highway flares
- Highway LED displays
- Historic reenactment illuminations
- Hoaxes
- Hoaxes or pranks
- Holograms
- Holographic images projected into the atmosphere
- Holographic memory artifacts
- Holographic navigation beacons
- Holographic projections
- Holographic sky projections for entertainment purposes
- Holographic weapon systems demonstrations
- Human-made space debris interacting with Earth’s atmosphere
- Human-made structures
- Hydroelectric power plant discharges
- Hyperdimensional beings transcending our reality and observing us
- Hypnotic mind-control experiments through extraterrestrial implants
- Ice crystals
- Ice crystals in the Earth’s atmosphere
- Ice crystals or snowflakes
- Ice fog
- Ice or frost formations on aircraft or spacecraft
- Illuminated advertising blimps
- Image hoaxes or Photoshop manipulations
- Imposter satellites
- In-flight advertising
- Incandescent light bulbs phenomenon
- Increased atmospheric pressure causing distortions or refractions
- Industrial smokestack emissions
- Inflatable aerial communication masts
- Inflatable aerial photography platforms
- Inflatable aerospace structures testing
- Inflatable disaster response shelters
- Inflatable habitat modules for space exploration
- Inflatable marine mammal decoys
- Inflatable radiation shielding for spacecraft
- Inflatable space debris removal satellites
- Inflatable structures
- Inflatable surveillance platforms
- Inflated advertising balloons
- Infrared detectors picking up false signals
- Infrared flares
- Infrared flares or decoys released by military aircraft
- Infrared heaters
- Infrared heating lamps
- Infrared projection illusions
- Infrared radiation from natural sources (thermal emissions)
- Infrared reflections
- Infrared reflections from windows
- Infrasound
- Infrasound effects
- Infrasound waves
- Innovations in metamaterials and optics
- Insect swarms near light sources
- Insect swarms or swarming behavior
- Insects
- Instrument malfunctions on aircraft or spacecraft
- Interactions between starlight and exoplanetary atmospheres
- Interdimensional beings projecting their energy forms as UFO sightings
- Interdimensional portals opening and releasing unidentified objects
- Interference from electrical wires
- Interferometric modulations from communication satellites
- Interferometric synthetic aperture radar imagery
- Intergalactic spaceships exploring the Earth
- International Space Station (ISS)
- International Space Station passes
- Interplanetary peacekeeping forces monitoring Earth for potential threats
- Interstellar black holes causing distortions in space-time fabric
- Interstellar communication experiments manifesting as unidentified lights
- Invented propulsion systems experiments
- Inverted double stars
- Inverted reflections in water
- Invisible beings creating holographic UFO sightings
- Ion-beam surface treatment lights
- Ionized air trails from aircraft leading edges
- Ionospheric disturbances
- Ionospheric irregularities
- Ionospheric satellite reflections
- Iridium flares
- Jet aircraft
- Jet engine exhaust
- Karmic energy manifestations and divine intervention events
- Keranium gas leak simulations
- Kites
- Kites or remote-controlled airplanes
- Laser experiments in physics research
- Laser harp performances
- Laser holography displays
- Laser installations
- Laser light shows
- Laser pen pointer reflections
- Laser pens
- Laser pointer pranks
- Laser pointers
- Laser pointers aimed at the sky
- Laser pointers or other light sources
- Laser shows
- Laser shows at concerts
- Laser surveillance systems
- Laser-induced plasma channel experiments
- Laser-induced plasma channels
- Late-stage rocket separation
- Launches of large weather balloons
- Layered cloud formations creating unusual atmospheric effects
- LED billboards
- LED traffic signal artifacts
- Lens abberations
- Lens abnormalities
- Lens artifacts
- Lens artifacts from scratched lenses
- Lens distortions
- Lens filter aberrations
- Lens flares
- Lens scratches
- Lenticular clouds
- Level crossing lights
- Light installations
- Light patterns from disco balls
- Light pillars
- Light pollution
- Light pollution (artificial lights)
- Light pollution from cities
- Light pollution from ships
- Light pollution from stadiums
- Light pollution from urban areas
- Light reflections
- Light sails
- Light stations
- Light-emitting architectural features
- Light-emitting billboards
- Light-emitting chemical reactions
- Light-emitting diode displays
- Light-emitting dirigibles
- Light-emitting sculptures
- Light-emitting vehicles
- Lighthouse beams
- Lightning
- Lightning ball phenomena
- Lightning balls
- Lightning or electrical storms
- Lightning phenomena
- Lightning sprites
- Living energy vortexes appearing as UFOs due to intense electromagnetic fields
- Living organisms from other planets exploring the Earth’s ecosystems
- Localized fog banks
- Lost and recovered aircraft
- Low Earth orbit reflectors
- Low power electromagnetic pulse generators
- Low-altitude cloud inversions
- Low-Earth Orbit (LEO) satellite deployments
- Low-flying or maneuvering military aircraft
- Low-level helicopter banner towing
- Luminescent organisms
- Luminous bacteria in stagnant water
- Luminous insects or bioluminescent organisms near water bodies
- Luminous paint on bridges reflecting sunlight
- Lunar halos
- Lunar impact flashes or meteoroid impacts
- Magnesium filament flares
- Magnetic anomalies
- Magnetic disturbances
- Magnetic field disruptions or anomalies
- Magnetic field disturbances
- Magnetic storms
- Magnetosphere ionosphere dynamics explorers’ emissions
- Man-made thunderstorms for cloud seeding
- Marine animal bioluminescence
- Marine deployments of flares or decoys
- Marine flares
- Mariner lights
- Mars
- Mass hallucinations
- Metal reflectors on the ground
- Meteor showers
- Meteorites
- Meteorological balloons
- Meteorological data buoys
- Meteorological instruments (radars, weather devices)
- Meteorological phenomena
- Meteorological radar anomalies
- Meteorological radar data interference
- Meteors
- Methane gas emissions or flares
- Methyl orange dye releases
- Microbursts or downdrafts causing unusual aerodynamic effects
- Migration patterns of birds
- Migratory birds
- Military aircraft
- Military aircraft (classified or experimental)
- Military cargo aircraft drops
- Military chaff releases
- Military exercises
- Military exercises or training maneuvers
- Military flares
- Military flares or chaffs
- Military flares used for training purposes
- Military radar jamming
- Military stealth aircraft
- Military training exercises
- Minuteman missile tests
- Mirage effects
- Mirage of distant airplanes
- Mirage tanks or holographic military vehicles
- Mirages
- Mirror reflections
- Mirrored sunglasses reflecting light sources
- Misaligned or malfunctioning camera equipment
- Miscellaneous debris (plastic bags, balloons)
- Misidentified aircraft
- Misidentified celestial bodies
- Misidentified celestial objects due to atmospheric mirages or scintillation
- Misinterpretation of photographs or images due to parallax errors
- Misinterpretation of radar data
- Misleading or manipulated photographs or videos
- Missiles
- Mobile broadcast lighting systems
- Mobile meteorological mast deployments
- Mobility scooter light show formations
- Model aircraft
- Model aircraft with LEDs
- Model rocket launches
- Moments of inertia measurements in celestial bodies
- Moon
- Moon dog or halo effects
- Moon glows
- Moon hoax or conspiracy theories
- Moon illusions
- Moonlight reflections on clouds
- Motion blur in photography
- Mountain range silhouettes
- Mountain-climbing headlamp reflections
- Mountaintop observatories
- Movie theater marquee reflections
- Multiple exposure photography effects
- Muons from cosmic rays
- Mylar balloons
- Mysterious sounds
- Nanophotonics and nanoplasmonics experiments
- Naval maneuvers
- Naval ship flares
- NEO rockets
- Neon light tubes
- Neon signs
- Neutron stars’ X-ray reflections
- Night lenses for color blindness corrections
- Night sky observatory or telescope light reflections
- Night vision distortions
- Night vision or infrared camera artifacts
- Nighttime cloudless sky glow
- Nighttime racing car lights
- Nighttime sky projections
- Noctilucent clouds
- Non-aerial reflections
- Non-Hermitian photonics experiments
- Nuclear decay detection devices’ emissions
- Nuclear or power plant anomalies
- Nuclear power plant cooling tower lights
- Nuclear reactors’ fluorescence
- Nuclear test detonation effects
- Occultations by celestial bodies
- Office building window reflections
- Oil platform flares
- Oil platform lights
- Oil refinery flare stacks
- Optical distortions caused by gravitational lensing of distant galaxies
- Optical distortions caused by transparent materials
- Optical effects due to windshield scratches
- Optical effects from sunglasses
- Optical effects of lenses
- Optical frequency comb spectroscopy anomalies
- Optical illusion caused by changes in focal length or perspective
- Optical illusions
- Optical illusions caused by clouds
- Optical illusions caused by moving objects
- Optical illusions created by long-exposure photography techniques
- Optical illusions or mirages caused by atmospheric conditions
- Optical image transmission experiments
- Optical instruments or equipment misalignments
- Optical interference or lens flares caused by multiple light sources
- Optical lens flares or ghosting
- Optical phase conjugation techniques’ artifacts
- Optical phased array technology artifacts
- Optical phenomena caused by atmospheric pollution
- Optical vortex beams
- Optics distortion
- Optics illusions
- Optoelectronic surface diffraction gratings
- Orbital angular momentum encoding experiments
- Orionids meteor shower
- Oscillating LED light displays
- Overexposed light trails in photographs
- Overexposed photographs
- Overlapping aircraft navigation lights
- Ozonized water sprays
- Paper lanterns
- Parachute displays
- Parachute flares
- Parhelia or sun dogs
- Persistent train after meteoroids
- Phantom radar contacts
- Phenomena caused by human activity (fireworks, pyrotechnics)
- Photomultiplier tube anomalies
- Photon pair production
- Photon-induced tunneling
- Photovoltaic kite electricity generators
- Piezoelectric backpacks for energy generation
- Piezoelectric elevator energy generation
- Piezoelectric floor tiles for energy generation
- Piezoelectric flooring energy harvesters
- Piezoelectric road energy harvesters
- Piezoelectric roof tiles for energy harvesting
- Piezoelectric self-powered lighting systems
- Piezoelectric street lighting systems
- Piezoelectric unmanned aerial vehicles
- Piezoelectric wind energy converters
- Pigeons taking flight together
- Pilot misinterpretations
- Piloted aerobatic stunts
- Piloted wing-suit formations
- Pipeline flame reflections
- Plane wingtip vortices
- Planetarium projections
- Planets
- Plasma balls
- Plasma discharges in thunderstorms
- Plasma phenomena
- Plasmonic nanostructures
- Plastic bags
- Plastic bottles reflecting light from the sun
- Platform collapses at construction sites
- Platform-shown fireworks displays
- Pod drogue and parachute systems
- Point source light emissions from lightning strikes
- Point source light reflections
- Polar lights or auroras
- Polarized reflections from glacial ice
- Police helicopter searchlights
- Portable laser light shows
- Potential breakthrough propulsion systems’ emissions
- Power grid malfunctions
- Power line corona discharge
- Power line interference or electrical disturbances
- Power lines
- Power plant emissions
- Powerline malfunction sparks
- Pranks and hoaxes
- Prism effects from glass windows
- Prismatic atmospheric scattering
- Prismatic optical effects
- Private aircraft (recreational or sightseeing)
- Project Blue Beam (hoax conspiracy theory)
- Project Blue Book misinterpretations
- Projected images on clouds
- Projected images onto clouds
- Projected images or holograms
- Projected star displays
- Projection technology
- Protostar jets
- Psychic projections from highly evolved sentient beings on distant worlds
- Psychological misperceptions
- Pulfrich effect illusions
- Pulsating aurora-like discharges
- Pulsating laser beams
- Pulsating stars
- Pulsed jet engine propulsion systems
- Pulsing plasma spheres
- Pulsing plasma tubes
- Quantum computing decoherence events
- Quantum computing entanglement experiments
- Quantum cryptography key distribution systems’ artifacts
- Quantum dot excitations
- Quantum encryption communication networks
- Quantum entanglement communication artifacts
- Quantum entanglement experiments resonating with distant interstellar beings
- Quantum information preservation artifacts
- Quantum superposition manifestations blurring the boundaries of reality
- Quantum teleportation experiments
- Radar anomalies or glitches
- Radar beam reflection
- Radar calibration targets
- Radar chaffs
- Radar glitches
- Radar reflection off birds
- Radar-anomalous rain showers
- Radio frequency interference
- Radio frequency interference from nearby electronics.
- Radio interference
- Radio interference or signal glitches
- Radio or TV tower lights
- Radio telescope interference
- Radio telescopes or antenna arrays
- Radio tower or antenna malfunctions
- Radio transmissions
- Radio waves interference
- Radio-controlled aircraft
- Radioactive decay causing faint glows in materials
- Radioactive emissions or anomalies
- Radioactive gas clouds
- Radioactive gas emissions
- Radioactive gas releases
- Radioactive material transport lights
- Radioactive waste disposal
- Radiofrequency interference from electronic devices
- Rafale aircraft lightning
- Rail crossing barrier lights
- Railgun projectile tests
- Rain or dew droplets
- Rainbow-like atmospheric effects
- Rapid radio-ionospheric correction signals
- Rare atmospheric phenomena
- Rare atmospheric phenomena (fogbows, iridescence)
- Rare phenomenon caused by atmospheric chemicals
- Reef lights
- Reentering space debris
- Reentry vehicles
- Reflected headlights from vehicles on the ground
- Reflected light from nearby buildings or structures
- Reflected light from solar panels or spacecraft sails
- Reflected moonlight on clouds
- Reflected sunlight from artificial satellites or space debris
- Reflected synthetic aperture radar signals
- Reflections
- Reflections from bodies of water
- Reflections from cameras and binoculars
- Reflections from distant space vehicles or space stations
- Reflections from polished surfaces
- Reflections in car windows
- Reflections on camera lenses
- Reflections on water surfaces
- Reflections or glare from glass windows or surfaces
- Reflective car decals causing illusions
- Reflective surfaces
- Refraction of light
- Refraction or scattering of light caused by atmospheric pollutants or particles
- Refractions or distortions caused by optics or lenses
- Refractive index fluctuations in the atmosphere
- Relay mirror balloons for long-range communication
- Remote controlled aircraft
- Remote controlled aircraft light shows
- Remote controlled blimp formations with LED lights
- Remote controlled boat formations with LED lights
- Remote controlled electric karts with LED lights
- Remote controlled fireworks displays
- Remote controlled flapping-wing aircraft
- Remote controlled flying cars with LED lights
- Remote controlled glider formations with LED lights
- Remote controlled ground robots for farming
- Remote controlled hybrid airships with LED lights
- Remote controlled kayak formations with LED lights
- Remote controlled robotic blimps
- Remote sensing instruments or equipment
- Remote-controlled aircraft with LED lights
- Remote-controlled drones
- Remote-controlled models
- Remote-controlled toys
- Reprogrammed LED billboards
- Research balloons
- Residual energy traces left behind by time travelers using UFO-like crafts
- Retinal flashes or floaters
- Retroreflector orb satellites
- Reusable launch vehicle reentries
- Reverberations in water
- Reverse image reflections
- Road construction lights
- Roadside emergency signal flares
- Roadside emergency signals
- Roadway reflectors
- Rocket boosters or fairings
- Rocket boosters or upper stages
- Rocket launches
- Rocket launches or test flights
- Rocket navigation lights
- Rocket propellant exhaust or condensation trails
- Rocket testing
- Rotating warning beacons
- Rotor kite systems
- Rotorcraft
- Rotorcraft lights
- Runway lights misinterpretations
- Salt particles floating in the atmosphere
- Sand or dust storms
- Sandstorm visibility reductions
- Satellite antennae tracking lights
- Satellite antennas or communication arrays
- Satellite communication disruptions
- Satellite communication interference
- Satellite debris reentry
- Satellite docking maneuvers
- Satellite flare-ups
- Satellite flares
- Satellite flares or reflections
- Satellite flares reflected in windows
- Satellite internet constellation trails
- Satellite reentries
- Satellite reentry burn
- Satellite remote sensing data artifacts
- Satellite thermal insulation flaking
- Satellite tracking systems or radar stations
- Satellites
- Scintillating light bulbs
- Scintillating scotomas
- Scintillation caused by atmospheric turbulence
- Sculptures
- Seagulls or other birds in flight
- Search and rescue flares
- Search and rescue operations
- Searchlight reflections on clouds
- Searchlights
- Searchlights or laser light shows
- Searchlights used in entertainment events
- Searchlights used in promotional events
- Secret aircraft testing facilities
- Secret government programs involving reverse-engineered alien technology
- Secret government projects
- Secret government tests
- Secret military aircraft
- Secret military or intelligence missions
- Secret military testing
- Secret scientific experiments
- Seismic activity or ground disturbances
- Self-illuminating exit signs
- Self-illuminating textiles
- Semaphore towers
- Shadow play caused by moving objects
- Shape-shifting alien creatures disguising themselves as UFOs
- Shimmering atmospheric layers
- Shiny debris
- Shooting range smoke grenades
- Shooting range targets
- Shooting range tracer rounds
- Shooting star reflections in windows
- Shooting stars
- Shooting stars in daylight
- Shooting stars or meteor showers
- Simulator training lights
- Single-photon detectors’ false positives
- Sketched or modeled UFO sightings
- Sky art installations
- Sky beacons or warning lights on tall structures
- Sky lanterns
- Sky mapping surveys
- Sky reflections
- Sky stereo photos taken from different angles
- Sky survey missions or satellite observations
- Sky surveys for scientific research
- Skydiver formations with pyrotechnics
- Skydiver smoke trails
- Skydivers
- Skydivers or paragliders
- Skydiving displays
- Skydiving formations
- Skydiving formations with LED lights
- Skydiving smoke trails
- Skyscrapers or tall buildings visible in the sky
- Skyward reflections
- Skywriting
- Skywriting or banner towing planes
- Skywriting planes
- Smart city streetlamp glitches
- Smoke from industrial chimneys
- Smokestack decrease emissions tests
- Smokestack emissions
- Snapchat filters
- Software glitches
- Solar balloons
- Solar birefringence
- Solar column reflections
- Solar coronal mass ejections
- Solar eclipse effects
- Solar eclipse phenomena
- Solar filament eruptions
- Solar flare reflections
- Solar flares
- Solar flares or coronal mass ejections
- Solar flares’ radio emissions
- Solar haloes
- Solar halos
- Solar halos or sunspots
- Solar nuclear fusion reactions
- Solar or lunar eclipses
- Solar or lunar halos caused by ice crystals or dust in the atmosphere
- Solar or lunar mirages caused by temperature variations in the atmosphere
- Solar panel reflections
- Solar panels reflections
- Solar phenomena
- Solar photothermoelectric power shades
- Solar plasma loops
- Solar plasma loops erupting into space
- Solar power plant reflections
- Solar prominences
- Solar radiation balloons
- Solar reflections
- Solar reflections from satellites or space stations
- Solar sail experiments
- Solar sails experiments
- Solar silicon nanowires’ reflections
- Solar thermonuclear fusion rays
- Solar tornadoes
- Solar transient phenomena
- Solar wind particles
- Solar-powered aircraft
- Solar-powered lighting systems
- Sonic booms
- Soot particles in the air
- Space debris
- Space debris (satellite parts)
- Space debris collisions
- Space junk
- Space junk reentries
- Space probes
- Space Shuttle or spacecraft reentries
- Space shuttle reentries
- Space-based inflatable structures
- Spacecraft rendezvous or docking maneuvers
- Spaced-based telescopes
- SpaceX rocket launches
- Sparklers
- Special effects in movies or TV shows
- Spectral reflections
- Spectroscopic analysis artifacts
- Spectroscopy wavelength artifacts
- Spinning advertising displays
- Spirit orbs materializing into UFO-like objects for brief moments
- Sports events
- Spotlights
- Spotlights during events
- Spotter planes monitoring wildfires or forest fires
- Spy satellites
- Stabilized video artifacts
- Stadium floodlights
- Staged events
- Staged photography tricks
- Stained glass window reflections
- Stargazing laser pointers
- Staring at bright objects causing temporary blindness
- Starlink satellite constellations
- Starlink satellite trains
- Stars
- Stars hidden by clouds
- Stealth aircraft
- Stealth balloons
- Steam plume emissions from power plants
- Steam releases from industrial plants
- Steerable meteorological balloons
- Stellar aberration effects
- Stellar occultations
- Stratified atmospheric airglow
- Stratified atmospheric diffraction
- Stratified atmospheric scattering experiments
- Stratosphere balloon experiments
- Stratospheric audio communications experiments
- Stratospheric chemistry experiments
- Stratospheric cloud seeding experiments
- Stratospheric gravity wave detection experiments
- Stratospheric ion composition measurements
- Stratospheric neutrons detection experiments
- Stratospheric radar reflections
- Stratospheric research balloons
- Stratospheric tissue culture experiments
- Stray radio signals
- Streaking meteors
- Streaks caused by small meteoroids burning up in the atmosphere
- Streamers from volcanoes
- Streetlamp bulb failures causing intermittent flickering
- Streetlamp gremlins causing erratic behavior
- Streetlamp head replacements resulting in different light patterns
- Streetlamp malfunctions
- Streetlights
- Streetlights or other artificial lights seen from a distance
- Streetlights reflecting on windows
- Strobe light effects
- Strobe lights
- Strobe lights on tall buildings
- Strobe lights on tall structures
- Strobing or flashing lights on buildings or towers
- Strontium aluminate powders used in art installations
- Stunt aircraft
- Stunt aircraft maneuvers
- Stunt planes
- Subatomic particle electromagnetic emissions
- Submarine light signals
- Submarine periscopes
- Submarine periscopes or snorkels
- Submarine surface releases
- Submarine-launched missiles
- Suborbital rocket launches or test flights
- Subsurface reflection or diffraction of sonar waves
- Sun dogs
- Sun glint on water surfaces
- Sundogs or halos
- Sunlight refraction through glass structures
- Sunset reflections on high-rise buildings
- Superluminal effects in photonic crystals
- Supermoon appearances
- Supernatural visits from beings not of this world
- Surface waves or tsunamis causing atmospheric disturbances
- Surveillance aircraft
- Survey balloons
- Swamp gas
- Swarm of insects
- Tall building lights
- Teleportation experiments gone awry
- Television broadcasts
- Television screen reflections in windows
- Television tower lights
- Temperature inversions
- Terrestrial gamma-ray flashes
- Tethered balloons
- Tethered objects
- Tethered objects in the atmosphere
- The Zirconium problem
- Thermal inversions
- Thermal inversions or heat mirages
- Thermoelectric energy harvesting experiments
- Thin cloud layers
- Thundercloud lightning
- Thunderhead clouds
- Thunderstorms
- Tidal bore light reflections
- Time slips and distortions causing encounters with future versions of ourselves
- Time travelers (subject to skepticism)
- Time travelers and their unusual devices
- Time-bending phenomena allowing glimpses of future technology
- Time-lapse photography artifacts
- Time-lapse photography artifacts due to long exposures
- Time-release photography artifacts
- Time-reversed wave packets
- Timecode LED readouts
- Topological insulators and their optical properties
- Town lights reflecting on low clouds
- Transcendent beings visiting to guide humanity through world-changing events
- Transient lunar phenomena (unexplained lunar observations)
- Tremendous reflection off glass surfaces
- Tropospheric ducting
- Tropospheric ducting effects
- Turboprop aircraft with rotating beacon lights
- Twilight
- Ultrasonic communication experiments
- Underwater archaeological surveys
- Underwater disturbances causing bubbles or light refractions
- Underwater magnetic field measurements
- Underwater mining operations
- Underwater torpedo propulsion experiments
- Underwater unmanned surface vehicles
- Underwater wireless communication tests
- Underwater wireless power transfer
- Undocumented celestial events
- Unique atmospheric chemistry
- Unmanned aerial vehicles (UAVs)
- Unmanned Ground Vehicles (UGVs)
- Unmanned Surface Vehicles (USVs)
- Unsynchronized traffic lights
- Unusual air traffic controller communications
- Unusual atmospheric diffraction patterns
- Unusual atmospheric pressures
- Unusual atmospheric refraction
- Unusual celestial events or configurations (rare alignments, conjunctions)
- UV light reflections
- V-shaped formations of birds
- Vehicle brake lights
- Vehicle headlights
- Vehicular light-emitting advertisements
- Venus (planet)
- Venus or Jupiter conjunction
- Venus or other bright planets
- Vertical-axis wind turbine blade balancing
- Very low frequency (VLF) antenna discharges
- Video compression artifacts
- Viral marketing campaigns
- Visible or infrared emissions from power plants or industrial sites
- Visitors from parallel dimensions demonstrating advanced technology
- Volcanic activity or eruptions
- Volcanic ash clouds
- Volcanic eruptions and ash clouds
- Volcanic lightning or volcanic plumes
- Vortices from jet engines
- Wakes from ships
- Wakes or trails from boats or ships
- Water dew on surfaces reflecting light
- Water droplets
- Weather balloons
- Weather modification experiments
- Weather modification techniques
- Weather radar anomalies
- Weather radar echoes
- Weather station anomalies
- Wind turbine blade reflections
- Wind turbine blade vibration control systems
- Wind turbine lights
- Wind turbines
- Wind turbulence effects on light
- Windblown debris
- Windborne debris from construction sites
- Windshield reflections causing optical illusions
- Winter fog light refractions
- Wire insulator flashover
- Wireless power transfer experiments
- Wireless power transmission experiments
- Wireless power transmission via atmospheric plasma
- Wireless power transmission via electromagnetic induction
- Wireless power transmission via RF resonant coupling
- Wireless powered underwater vehicles
- Wireless underwater charging hubs
- Wireless underwater sensor networks
- Wireless underwater vehicle charging
- Wormholes opening and allowing intergalactic travelers to pass through
- X-ray transient sources
- Yacht navigation lights
