phénomènes aériens non expliqués
비정상적이고 미확인된 것으로 간주되는 공중, 수중 및 수중 현상
mintcream
zjawisko widoczne na niebie, którego nie daje się łatwo zidentyfikować
Objektu Hegalari Ezezagun
A "space flyer" depicted on the February 1912 cover of Modern Electrics as an illustration for the science fiction story Ralph 124C 41+ by Hugo Gernsback
Mystery airship SFCall Nov 22 1896.jpg
ongeïdentificeerd vliegend voorwerp
جسم طائر مجهول
nenavadna vidna anomalija na nebu, ki je ni mogoče zlahka prepoznati
미확인비행체
unusual apparent anomaly in the sky that is not readily identifiable
objeto volante, real o aparente, que no puede ser identificado por el observador
необична појава на небу, коју није лако идентификовати
Objeto voador não identificado
Penampakan benda di langit yang tidak bisa diidentifikasi
Непізнаний літаючий об'єкт
आकाश में असामान्य घटना जिसे आसानी से पहचाना नहीं जा सकता
Science and Invention Feb 1922 pg912 - War of the Future.jpg
不明来历、不明性质，漂浮及飞行在天空的物体
Depiction of a flying saucer by illustrator Frank R. Paul on the October 1929 issue of Hugo Gernsback's pulp science fiction magazine Science Wonder Stories
Amazing Stories August 1946 back cover.png
Úfó
Back cover of Amazing Stories illustrated by Frank R. Paul in August 1946 featuring many disc-shaped spacecraft
Nifo
ονομασία ανεξήγητων εναέριων φαινομένων
Amazing stories quarterly 1930win.jpg
termo para fenômenos aéreos não prontamente identificáveis
Oidentifierat flygande föremål
tundmatu lendav ese
ongewone skynbare anomalie in die lug wat nie maklik identifiseerbaar is nie
Objet volant non identifié
異常で未確認とされる空中、水中、透過体現象
UFO
Unidentified flying object
er betegnelsen for ethvert flyvende objekt, hvis oprindelse på observationstidspunktet er ukendt
UFO-like alleged sightings before the 20th century
Неопознанный летающий объект
ယာဥ်ကျာ မသက္ကုတီကေတ်မာန်
semblata anomala fenomeno en la cielo
azonosítatlan repülő tárgy
neordinara objekto en ĉielo, kies identeco ne estas facile klarigebla
будь-який незвичайний, неочевидний об'єкт або явище в небі, причина якого не може бути ідентифікована спостерігачем
Illustration from 1903 by Henrique Alvim Corrêa showing the first Martian emerging from a cylinder that had fallen from the sky for an edition of The War of the Worlds by H. G. Wells.
אובייקט שנצפה בשמיים שזהותו אינה ידועה
Objecte volador no identificat
Münchhausen Lands On Mars by Hugo Gernsback in Amazing Stories April 1928 page 39.jpg
Mga hindi tukóy na pangyayari o bagay sa himpapawid
неизвестные объекты в небе
আকাশে দৃশ্যমান কোনো অজানা বস্তু
The War of the Worlds by Henrique Alvim Corrêa, original graphic 05.jpg
oggetto volante non identificato
未確認飛行物体
Mystery airship SFCall Nov 29 1896.jpg
Ovni
不明飞行物
Science fiction depictions of spacecraft similar to flying saucers before the first widely-reported UFO sighting in 1947
جسم مجهول يتنقل في الجو ولا تعرف حقيقته العلمية حتى اليوم
Cover of Amazing Stories winter 1930 issue depicting a disc-shaped spacecraft
Tanımlanamayan uçan nesne
fenomén pozorování neidentifikovaných létajících předmětů
Objek terbang tak teridentifikasi
havaitsijalle tunnistamaton lentävä tai lentävältä näyttävä kohde
ovanlig uppenbar anomali på himlen som inte är enkelt identifierbar
left
Phänomene, die von Beobachtern als fliegend wahrgenommen werden und nicht identifiziert werden können
پدیده‌ای غیرمعمول در آسمان که به راحتی قابل شناسایی نیست
S'anomena Ovni a un objecte volador ni identificat.
ΑΤΙΑ
Science Wonder Stories Nov 1929 - flying saucer.jpg
Illustration by Frank R. Paul from February 1922 in Science and Invention showing Nikola Tesla's vision of warfare in the future with sea and air craft "controlled and directed" by radio waves
Himmelserscheinung über Nürnberg vom 14. April 1561.jpg
Illustration for a story by Hugo Gernsback in pulp science fiction magazine Amazing Stories from April 1928