Christianity has the answer to the question of whether aliens are real. Please watch these two amazing videos, and if you are a Pastor, please be ready to teach your flock that the alien deception is the greatest deception which will break the church if we are not prepared to recognise what the truth of the situation is. We have AUTHORITY over these entities, through the wonderful name of the Lord Yahshua (Jesus).
These are both worth your time, and in particular if you are a preacher, watch both, as the second one covers more the doctrines of these aliens, which, naturally, counter the bible. Your flock needs to be prepared for this deception.
God Bless you