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Ufology (pronounced /juːˈfɒlədʒɪ/) is a neologism coined to describe the collective efforts of those who study unidentified flying object reports and associated evidence.
Type - I (a, b,c, d)- Observation of an unusual object, spherical discoidal, or of another geometry, on or situated close to the ground (tree height, or lower), which may be associated with traces - thermal, luminous, or mechanical effects. a - On or near ground. b - Near or over body of water. c - Occupants appear to display interest in witnesses by gestures or luminous signals. d - Object appears to be “scouting” a terrestrial vehicle. Type - II (a, b,c) - Observation of an unusual object with vertical cylindrical formation in the sky, associated with a diffuse cloud. This phenomenon has been given various names such as “cloud-cigar” or “cloud-sphere.” a - Moving erratically through the sky b - Object is stationary and gives rise to secondary objects (sometimes referred to as “satellite objects”) c - Object is surrounded by secondary objects Type - III (a, b,c, d,e)- Observation of an unusual object of spherical, discoidal or elliptical shape, stationary in the sky. a - Hovering between two periods of motion with “falling-leaf” descent, up and down, or pendulum motion b - Interruption of continuous flight to hover and then continue motion c - Alters appearance while hovering - e.g., change of luminosity, generation of secondary object, etc. d - “Dogfights” or swarming among several objects e - Trajectory abruptly altered during continuous flight to fly slowly above a certain area, circle, or suddenly change course Type IV (a, b,c, d) - Observation of an unusual object in continuous flight. a - Continuous flight b - Trajectory affected by nearby conventional aircraft c - Formation flight d - Wavy or zig-zag trajectory Type V (a, b,c)- Observation of an unusual object of indistinct appearance, i.e., appearing to be not fully material or solid in structure. a - Extended apparent diameter, non-point source luminous objects (“fuzzy”) b - Starlike objects (point source), motionless for extended periods c - Starlike objects rapidly crossing the sky, possibly with peculiar trajectories