extraterrestrial spacecraft

Five years ago, scientists discovered an elongated interstellar object passing through the solar system called 'Oumuamua, which had properties that were so unusual that some experts like Harvard physicist Avi Loeb believe it had all the signs of being an extraterrestrial spacecraft.

Andrew Fraknoi, an astronomer at the Fromm Institute for Lifelong Learning at the University of San Francisco, echoes the widely held sentiment among scientists that, for decades, the media has lavished too much attention on sensational claims that vague lights in the sky are actually extraterrestrial spacecraft.

A preliminary CNN analysis of the upcoming study suggests that the investigation has yet to find authentic evidence of extraterrestrial spacecraft but has not reached a “definitive assessment” on the matter.

Though these objects fit the technical definition of a UFO — meaning an unidentified flying object — they may not adhere to the folk understanding of "UFO" as synonymous with an extraterrestrial spacecraft.

UFO’s: Top Secret Alien Files This new special explores how military personnel and law enforcement officers respond when they come face to face with what appear to be extraterrestrial spacecraft.