The UFO phenomenon refers to the observation of unidentified flying objects that cannot be easily explained by conventional means. These sightings often involve strange lights or shapes in the sky, leading to speculation about their origins. While many UFO reports can be attributed to natural or man-made objects, some remain unexplained, fueling interest and debate among enthusiasts and researchers. The term "UFO" was popularized in the 1950s, and since then, various organizations, including Project Blue Book, have investigated these sightings. The phenomenon has also inspired numerous books, movies, and documentaries, contributing to a cultural fascination with the possibility of extraterrestrial life and advanced technology.