An unidentified flying object (UFO), or unidentified anomalous phenomenon (UAP), is any perceived aerial phenomenon that cannot be immediately identified or explained. Upon investigation, most UFOs are identified as known objects or atmospheric phenomena, while a small number remain unexplained.
In ufology, a close encounter is an event in which a person witnesses an unidentified flying object (UFO). This terminology and the system of classification behind it were first suggested in astronomer and UFO researcher J. Allen Hynek's 1972 book The UFO Experience: A Scientific Inquiry. Categories beyond Hynek's original three have been added by others but have not gained universal acceptance, mainly because they lack the scientific rigor that Hynek aimed to bring to ufology.
Ufology is the investigation of unidentified flying objects (UFOs) by people who believe that they may be of extraordinary origins. While there are instances of government, private, and fringe science investigations of UFOs, ufology is generally regarded by skeptics and science educators as an example of pseudoscience.
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 1949. 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 extraterrestrial hypothesis (ETH) proposes that some unidentified flying objects (UFOs) are best explained as being physical spacecraft occupied by extraterrestrial intelligence or non-human aliens, or non-occupied alien probes from other planets visiting Earth.
The National Investigations Committee On Aerial Phenomena (NICAP) is an unidentified flying object (UFO) research group most active in the United States from the 1950s to the 1980s. It remains active primarily as an informational depository on the UFO phenomenon.
The Kelly–Hopkinsville encounter was a claimed close encounter with extraterrestrial beings in 1955 near the communities of Kelly and Hopkinsville in Christian County, Kentucky, United States. UFOlogists regard it as one of the most significant and well-documented cases in the history of UFO incidents, while skeptics say the reports were due to "the effects of excitement" and misidentification of natural phenomena such as meteors and owls. The United States Air Force classified the alleged incident as a hoax in the Project Blue Book files.
Skinwalker Ranch, also known as Sherman Ranch, is a property of approximately 512 acres (207 ha), located southeast of Ballard, Utah, that is reputed to be the site of paranormal and UFO-related activities. Its name is taken from the skin-walker of Navajo legend concerning vengeful shamans.
Robert Sheaffer is an American freelance writer and UFO skeptic. He is a paranormal investigator of unidentified flying objects, having researched many sightings and written critiques of the hypothesis that UFOs are alien spacecraft. In addition to UFOs, his writings cover topics such as Christianity, academic feminism, the scientific theory of evolution, and creationism. He is the author of six books.
Identifying unidentified flying objects (UFOs) 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 National UFO Reporting Center (NUFORC) is a non-governmental, non-profit corporation registered in Washington State, the United States that documents UFO sightings and/or alleged alien contacts.
The Trans-en-Provence case was an event in which an unidentified flying object is claimed to have left physical evidence in the form of burnt residue on a field. The event took place on 8 January 1981 outside the town of Trans-en-Provence in the French department of Var. It was described in Popular Mechanics as "perhaps the most completely and carefully documented sighting of all time."
This is a list of alleged sightings of unidentified flying objects or UFOs in France.
This is a list of notable alleged sightings of unidentified flying objects (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.
Below is a partial list of alleged sightings of unidentified flying objects or UFOs in Canada.
Cussac is a commune in the Cantal department in the Auvergne region in south-central France.
In ufology, the Taylor Incident, a.k.a. Livingston Incident or Dechmont Woods Encounter is the name given to claims of sighting an extraterrestrial spacecraft on Dechmont Law in Livingston, West Lothian, Scotland in 1979 by forester Robert "Bob" Taylor (1919–2007).
The interdimensional hypothesis is a proposal that unidentified flying object (UFO) sightings are the result of experiencing other "dimensions" that coexist separately alongside our own in contrast with either the extraterrestrial hypothesis that suggests UFO sightings are caused by visitations from outside the Earth or the psychosocial hypothesis that argues UFO sightings are best explained as psychological or social phenomenon.
The Advanced Aerospace Threat Identification Program (AATIP) was an unclassified but unpublicized investigatory effort funded by the United States Government to study unidentified flying objects (UFOs) or unexplained aerial phenomena (UAP). The program was first made public on December 16, 2017. The program began in 2007, with funding of $22 million over the five years until the available appropriations were ended in 2012. The program began in the U.S. Defense Intelligence Agency.
