Read the passage.UFOs, or unidentified flying objects, are often the topic of science fiction novels. In reality, UFOs are often aircraft, kites, clouds, or meteors that observers are unable to recognize at first glance. A UFO near Roswell, New Mexico, made headlines in the mid-twentieth century and remains a pop-culture phenomenon. In more modern history, satellite launches have caused rocket debris that is often observed and reported as a UFO.