Roswell UFOs

It should be ” An UFO ” really shouldn’t it?
An unidentified flying object.

If you put it in a sentence it might help you out?
I just seen a unidentified flying object
or
i just seen an unidentified flying object.

I’d say an : )

An UFO would be correct…but it doesn’t sound right does it.

What I understand is if the next word starts with a vowel then use the word “an”

like an Apple, an Orange, an Elephant, an Igloo

if the next word begins with a consonant then use “a”

like a Building, a Dog, a Cat

EDIT: Good answer Chrisshore…glad you explained that whole “U” thing!!

The correct is a UFO, it’s all about grammar rules.
You use “a” when the noun you are referring to begins with a consonant (b, c, d, f, g, h, j, k, l, m, n, p, q, r, s, t, v, w, x, y or z), for example, “a city”, “a factory”, and “a hotel”.

You use an when the noun you are referring to begins with a vowel (a, e, i, o, u)
BUT the above is the general rule.Because with the vowel u and consonant h the rule has the exception that the pronunciation matters not the spelling.

Pronunce loud the words:hour,horse, university,umbrella UFO
.You say “hour” like “our” you don’t say the h, so it is an hour.
You say university or ufo and the sound of u is like the y saying yahoo
So the correct is a university,a ufo but an umbrella .
Also when you want to search such questions type on eg google machine ” a an grammar” and it will give u more accurate sites to read.Type your question and add the word grammar.And of course we are here for u ,too.