Are unidentified flying objects real?

As an unidentified flying object (UFO) is simply an object in the sky that is of an unidentified nature and/or origin, they are quite real. Many people believe that they are alien spacecraft, though no evidence of extraterrestrial life has ever been found. Most reported unidentified flying objects are found to be nothing more than ordinary objects such as aircraft, weather balloons, comets, meteors, or even illusions caused by atmospheric conditions.