No i dont think so. If you could here the Ufo it would be easier to notice most people SEE it not HEAR it. But then theres the chance of being to far away but u can still here plaines? so its up for disscusion.
When it leaves Earth it usually sounds like a big boom I'm not really sure if there even is a UFO. "Whirrrrrrrrrrrrrr"
using UFOS
Since UFOs are Unidentified Flying objects, it is impossible to know what they are made up of, at least until we identify them.
yes
UFOs are simply things that not readily identified. They are not 'alien' spaceships. Nor do they defy gravity and there are many phenomena that do not make any noise.
Where humans and alcohol are, UFOs will be.
the correct answer is UFOs thanks for asking
There have been reports of sightings of white UFOs.
It depends if you believe in aliens and UFOs. I have heard about some of the English sightings and some sound very authentic.
The ones who study UFOs are called Ufologist. They study every thing about unidentified flying objects (UFOs).
Please check the related links for information about UFOs.
UFOs can go as high as your imagination allows.
Since UFOs are unidentified, it is unknown what is inside of them.