No, the Bible never mentions unidentified flying objects, and never discusses life beyond earth.
There is, however, an “unusual flying object” in one of Zechariah’s dreams:
Zechariah 5:1-2 (NIV)
I looked again—and there before me was a flying scroll!
He asked me, “What do you see?”
I answered, “I see a flying scroll, thirty feet long and fifteen feet wide.
This enormous scroll symbolised a curse that God was sending to warn people about stealing and lying (Zec 5:3).