Unidentified aerial phenomena (UAP) refer to objects or lights observed in the sky that cannot be easily identified or explained. These occurrences have been reported by both civilians and military personnel, often sparking curiosity and speculation about their nature. UAP can include anything from unusual aircraft to natural atmospheric events. Governments, including the United States, have taken interest in UAP, leading to investigations and reports aimed at understanding these sightings. The term is often used instead of "UFO" to emphasize a more scientific approach to studying these phenomena without implying extraterrestrial origins.