An unidentified flying object is an object or phenomenon seen in the sky but not yet identified or explained. The term was coined when United States Air Force investigations into flying saucers found
A Fata Morgana, a type of mirage in which objects located below the astronomical horizon appear to be hovering in the sky just above the horizon, may be responsible for some UFO sightings.
Twilight phenomenon from a Falcon 9 rocket launch
The celestial phenomenon over Basel in 1566.
1561 celestial phenomenon over Nuremberg as printed in an illustrated news notice.
Area 51 is a highly classified United States Air Force facility within the Nevada Test and Training Range in southern Nevada, 83 miles north-northwest of Las Vegas.
Unidentified flying object
…the USS Enterprise in Star Trek. UFOs and extraterrestrials have been featured in many movies. The intense secrecy surrounding the Nevada base known as Area 51 has made it a frequent subject of conspiracy theories and a longstanding part of UFO popular culture. In July 2019, more than a million people marked…
Area 51 viewed from distant Tikaboo Peak
"The Ranch" with U-2 flight line ca. 1957
A 1966 Central Intelligence Agency (CIA) diagram of Area 51, found in an untitled, declassified paper, showing the runway overrun for OXCART (Lockheed A-12) and the turnaround areas (CIA / CREST RDP90b00184r000100040001-4)
An A-12 (60-6924) takes off from Groom Lake during one of the first test flights, piloted by Louis Schalk, 26 April 1962.