[thedoc (OP)]

Dušan Veselka asked the Naked Scientists:
   
My name is Dušan Veselka, Czech Republic. I would like to know what you think about (for me rather boggling) phenomenon called "UFO" (Unidentifiable Flying Object). You are in swirl of scientific events so perhaps, I believe, you heard a lot of it. Just what's your opinion on it?
 Â 
Thanks very much, I admire your knowledge...
 Â 
Dušan Veselka
What do you think?

[Colin2B]

Unidentified Flying Objects are just that - unidentified. When investigated turn out to be mostly weather balloons, atmospheric effects, etc.

The term has been picked up by believers in extraterrestrial visitors, but I've never seen convincing evidence.