lets think about this logically. we have sent many robots to every planet in our solar system, where we have concluded that no life exists, so if those are ufos, then they aren't from our solar system. this leads to another question, if they are not from our solar system, then why would they choose our sun out of all of the stars in the universe, why this one. also, why would they position themselves so close to the sun, where there are millions of high speed, flying objects that could destroy the ufo at any minute?