An unidentified flying object (UFO) is any perceived aerial phenomenon that cannot be immediately identified or explained. On investigation, most UFOs are identified as known objects or atmospheric phenomena, while a small number remain unexplained.
The term "foo fighter" was used by Allied aircraft pilots during World War II to describe various UFOs or mysterious aerial phenomena seen in the skies over both the European and Pacific theaters of operations.
Project Blue Book was the code name for the systematic study of unidentified flying objects by the United States Air Force from March 1952 to its termination on December 17, 1969. The project, headquartered at Wright-Patterson Air Force Base, Ohio, was initially directed by Captain Edward J. Ruppelt and followed projects of a similar nature such as Project Sign established in 1947, and Project Grudge in 1948. Project Blue Book had two goals, namely, to determine if UFOs were a threat to national security, and to scientifically analyze UFO-related data.
The Carson Sink Case is a UFO incident alleged by John L. McGinn and John R. Barton, two United States Air Force Colonels, to have taken place near Carson Sink in western Nevada in the United States while they were en route from California to Colorado in a B-25 on July 24, 1952. Both colonels worked at the Pentagon at the time with assignments that would have made them very familiar with military aircraft of the era, both domestic and foreign. The aircraft were also reported as being seen by hundreds of residents.
The Robertson Panel was a scientific committee which met in January 1953 headed by Howard P. Robertson. The Panel arose from a recommendation to the Intelligence Advisory Committee (IAC) in December 1952 from a Central Intelligence Agency (CIA) review of the U.S. Air Force investigation into unidentified flying objects, Project Blue Book. The CIA review itself was in response to widespread reports of unidentified flying objects, especially in the Washington, D.C. area during the summer of 1952.
Green fireballs are a type of unidentified flying object (UFO) that has been reported since the early 1950s. Early sightings primarily occurred in the southwestern United States, particularly in New Mexico. Although some ufologists and ufology organizations consider green fireballs to be of artificial extraterrestrial origin, mainstream, non-pseudoscientific explanations have been provided, including natural bolides.
Project Sign was an official U.S. government study of unidentified flying objects (UFOs) undertaken by the United States Air Force (USAF) and active for most of 1948. It was the precursor to Project Grudge.
The Mariana UFO Incident occurred in August 1950 in Great Falls, Montana. The film footage of the sighting is believed to be among the first ever taken of what came to be called an unidentified flying object. The footage was investigated by the U.S. Air Force, and found to be reflections from two F-94 jet fighters.
Identifying unidentified flying objects is a difficult task due to the normally poor quality of the evidence provided by those who report sighting the unknown object. Observations and subsequent reporting are often made by those untrained in astronomy, atmospheric phenomena, aeronautics, physics, and perception. Nevertheless, most officially investigated UFO sightings, such as from the U.S. Air Force's Project Blue Book, have been identified as being due to honest misidentifications of natural phenomena, aircraft, or other prosaic explanations. In early U.S. Air Force attempts to explain UFO sightings, unexplained sightings routinely numbered over one in five reports. However, in early 1953, right after the CIA's Robertson Panel, percentages of unexplained sightings dropped precipitously, usually being only a few percent in any given year. When Project Blue Book closed down in 1970, only 6% of all cases were classified as being truly unidentified.
The 1976 Tehran UFO Incident was a radar and visual sighting of an unidentified flying object (UFO) over Tehran, the capital of Iran, during the early morning hours of 19 September 1976. During the incident, two Imperial Iranian Air Force F-4 Phantom II jet interceptors reported losing instrumentation and communications as they approached the object. These were restored upon withdrawal. One of the aircraft also reported a temporary weapons systems failure while the crew was preparing to open fire.
The Chiles-Whitted UFO encounter occurred at approximately 2:45 AM on July 24, 1948, in the skies near Montgomery, Alabama, United States. Two commercial pilots, Clarence S. Chiles and John B. Whitted, claimed to have observed a "glowing object" pass by their plane before it appeared to pull up into a cloud and travel out of sight.
This is a list of notable alleged sightings of unidentified flying objects or UFOs in the United Kingdom. Many more sightings have become known since the gradual release, between 2008 and 2013, of the Ministry of Defence's UFO sighting reports by the National Archives. In recent years, there have been many sightings of groups of slowly moving lights in the night sky, which can be easily explained as Chinese lanterns. Undertaken between 1997 and 2000, Project Condign concluded that all the investigated sightings of unidentified aerial phenomena in the UK could be attributed to misidentified but explicable objects, or poorly understood natural phenomena.
The 1952 Washington, D.C. UFO incident, also known as the Washington flap, the Washington National Airport Sightings, or the Invasion of Washington, was a series of unidentified flying object reports from July 12 to July 29, 1952, over Washington, D.C. The most publicized sightings took place on consecutive weekends, July 19–20 and July 26–27. UFO historian Curtis Peebles called the incident "the climax of the 1952 (UFO) flap" - "Never before or after did Project Blue Book and the Air Force undergo such a tidal wave of (UFO) reports."
The Exeter incident or Incident at Exeter was a highly publicized UFO sighting that occurred on September 3, 1965, approximately 5 miles (8 km) south of Exeter, New Hampshire, in the neighboring town of Kensington. Although several separate sightings had been made in the area by numerous witnesses in the weeks leading up to the specific incident, it was the September 3 sighting which eventually became by far the most famous, involving a local teenager and two police officers. The November/December 2011 edition of Skeptical Inquirer offers an explanation of the incident, based on details reported by the eyewitnesses.
A flying saucer is a descriptive term for a type of flying craft having a disc or saucer-shaped body, commonly used generically to refer to an anomalous flying object. The term was coined in 1947 but has generally been supplanted since 1952 by the United States Air Force term unidentified flying objects. Early reported sightings of unknown "flying saucers" usually described them as silver or metallic, sometimes reported as covered with navigation lights or surrounded with a glowing light, hovering or moving rapidly, either alone or in tight formations with other similar craft, and exhibiting high maneuverability.
The Gorman dogfight was a widely publicized UFO incident which took place on October 1, 1948, in the skies over Fargo, North Dakota, United States. United States Air Force (USAF) Captain Edward J. Ruppelt wrote in his bestselling and influential The Report on Unidentified Flying Objects that the "dogfight" was one of three "classic" UFO incidents in 1948 that "proved to [Air Force] intelligence specialists that UFOs were real," along with the Chiles-Whitted UFO encounter and the Mantell UFO incident. However, in 1949 the USAF concluded that the Gorman dogfight had been caused by a lighted weather balloon.
The Lakenheath-Bentwaters Incident was a series of radar and visual contacts with unidentified flying objects over airbases in eastern England on the night of 13–14 August 1956, involving personnel from the Royal Air Force (RAF) and the United States Air Force (USAF). The incident has since gained some prominence in the literature of ufology and the popular media.
Japan Air Lines Cargo Flight 1628 was a UFO incident that occurred on November 17, 1986, involving a Japanese Boeing 747-200F cargo aircraft. The aircraft was en route from Paris to Narita International Airport, near Tokyo, with a cargo of Beaujolais wine. On the Reykjavík to Anchorage section of the flight, at 17:11 over eastern Alaska, the crew first witnessed two unidentified objects to their left. These abruptly rose from below and closed in to escort their aircraft. Each had two rectangular arrays of what appeared to be glowing nozzles or thrusters, though their bodies remained obscured by darkness. When closest, the aircraft's cabin was lit up and the captain could feel their heat on his face. These two craft departed before a third, much larger disk-shaped object started trailing them. Anchorage Air Traffic Control requested an oncoming United Airlines flight to confirm the unidentified traffic, but when it and a military craft sighted JAL 1628 at about 17:51, no other craft could be distinguished. The sighting lasted 50 minutes and ended in the vicinity of Denali.
The Kenneth Arnold UFO sighting occurred on June 24, 1947, when private pilot Kenneth Arnold claimed that he saw a string of nine, shiny unidentified flying objects flying past Mount Rainier at speeds that Arnold estimated at a minimum of 1,200 miles an hour (1,932 km/hr). This was the first post-World War II sighting in the United States that garnered nationwide news coverage and is credited with being the first of the modern era of UFO sightings, including numerous reported sightings over the next two to three weeks. Arnold's description of the objects also led to the press quickly coining the terms flying saucer and flying disc as popular descriptive terms for UFOs.
The Little Rissington UFO incident was an encounter in October 1952 between a Gloster Meteor and three unidentified saucer-shaped objects over Gloucestershire.
