U F O is an acronym for unidentified flying object in English (i.e. “unidentified flying object”), which refers to an object or phenomenon of objects flying in the sky that cannot be identified as something even after when it happened was studied very carefully by many people. Many UFOs are depicted with strange features, and it has been deduced that these UFOs are spaceships built by extraterrestrial beings.

There is no clear scientific evidence that such spacecraft exist, however various types of trace evidence are controversial in the community. Many UFO researchers believe that the evidence is now clear but governments are hiding it, possibly out of fear of spreading fear and division if such information is revealed. . In Vietnamese, UFOs are often referred to by the simple symbol of Flying Saucer.

On January 25, 1878, the Deninson Daily reported that John Martin, a local farmer, had reported the day before that he had seen a black, saucer-shaped object resembling a balloon in flight. “at tremendous speed”, and also uses the word “disc” to describe the unidentified flying object. About 70 years later, in 1947, the media used the term “flying saucer” to describe unidentified flying objects as seen by Kenneth Arnold.

The object that Kenneth Arnold has said is unlikely to have the form of a “flying saucer”. Arnold first described and drew eight large, round objects, whose ends were rounded and the dead ends became a point behind. (See Kenneth Arnold for detailed drawings and descriptions.) Drawing of the first, somewhat larger, boomerang or hooded figure. Anyway, years later, Arnold suggested changing the phrase “like a saucer” to “a flying saucer”.

In English, another term that is also used by the media is “flying saucer” as well as “flying saucer”.

In the mid-1950s, a survey found that the term “flying saucer” was deeply ingrained in the American vernacular. 94% of respondents said that they are familiar with it, and it appears often in the news, quite famous, surpassing common military training (75%), bookies (horse bettors) professional) (67%), or cold war (cold war) (58%).

“Flying saucer” is the applied information term used for almost any unidentified object in the air from late autumn 1940 to autumn 1960, even if they are not actually disks. . The term became even more popular in the late autumn of 1960. The use of “UFO” instead of “flying saucer” was first suggested in 1952 by Edward J. Ruppelt, editor of Project Blue Book of United States Air Force. Ky, he feels the “flying saucer” is not capable of capturing all the distinctive features of the phenomena in question. His proposal was quickly rejected by the force.

The term UFO has led to many debates over the meaning of the word. Skeptics argue that “UFO” simply means “unidentified” object when observed rather than inexplicable, thus having little to do with life beyond Earth. On the contrary, some researchers argue that the above term has been completely limited to what is seen, opening objections to asking for further research, posing questions for conventional explanations.

In the United States Air Force regime in 1954, there was a definition of UFOB (Undentified Flying Object) as objects transported by aircraft in missions, aerodynamic or special features, not specialized. Current aircraft and missiles are not identified as accurately as conventional types, furthermore UFOB is reserved for state secret purposes and is guaranteed to be “professional in nature”. It is clear that UFBO cannot be applied to explain UFO sightings, natural hallucinogenic entities or man-made objects, except that it is possible that the aircraft was never known to have originated in another country.

Thus, the letter “U” in UFO, instead of “unknown (unknown)”, the more appropriate explanation would be inexplicable (unexplained) or unusual (unconventional).

In Spanish, Portuguese and French, the corresponding term for UFOs is OVNI (Spanish: Objeto Volador No Identificado; Portuguese: Objeto Voador Brain Identificado; French: Objet Volant Non Identifié) .