NASA found that between 2 and 5 percent of the total observations "are probably really abnormal" Among the examples the agency touched on was the metal spherical object that flew in the Middle East in 2022, which did not pose a threat to air safety. On the question of whether there are really aliens or UFOs in space, NASA says there is no evidence yet of extraterrestrial beings, but is still looking into it.
NASA defines "unknown flying phenomena" as "observations of events in the sky that cannot be identified as aircraft or natural phenomena"