UFO more properly U.F.O. is an abbreviation. Unidentified Flying Object. if you pronounce it as a word- ( You-Foe!) it not only implies hostile intent, but is an acronym, which is pronounced as a word- such as Radar. ( radio direction and ranging) for example. There is your answer.
a UFO See http://grammar.ccc.commnet.edu/grammar/abbreviations.htm (all the way to the bottom) for help determining when to use a or an before an abbreviation.
Ufo's do exist because a Ufo is a thing in the sky that you can not explain.
They usually see UFO's at a UFO sighting
It is unknown what is inside of a UFO.
movies that have UFO's in them i guess
The 'F' in UFO stands for "Flying". UFO is an acronym for Unidentified Flying Object.
Air +metal= ufo
You put the rod in the UFO and
Alien+rocket=UFO
The average UFO has no weight. The average UFO is a digital image or an image on film.
If a UFO was found by a person, then it was no longer flying and no longer unidentified; therefore, no longer a UFO.
UFO stands for unidentified flying object.