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The Black Knight satellite is claimed by some conspiracy theorists to be an object approximately 13,000 years old of extraterrestrial origin orbiting Earth in near-polar orbit. Critics and mainstream academics have called it a conspiracy theory and a myth. == History == According to UFO conspiracy theorists, the Black Knight is an "alien satellite which has orbited Earth for 13,000 years", however, the mythical object is most likely a conflation of several disconnected stories〔〔〔 according to senior education support officer Martina Redpath of Armagh Planetarium in Northern Ireland: Black Knight is a jumble of completely unrelated stories; reports of unusual science observations, authors promoting fringe ideas, classified spy satellites and people over-interpreting photos. These ingredients have chopped up, stirred together and stewed on the internet to one rambling and inconsistent dollop of myth.〔 The origin of the Black Knight legend is often "retrospectively dated" back to natural extraterrestrial repeating sources heard during the 1899 radio experiments of Nikola Tesla and long delayed echos first heard by amateur radio operator Jorgen Hals in Oslo, Norway in 1928. According to the Daily Express, "the noises from 1899 and 1928 remain a mystery, but the possible causes do not so far include an alien satellite, according to scientists."〔 In 1973, Scottish author Duncan Lunan analyzed the long delayed radio echoes received by Hals and others and speculated that they could possibly originate from a 13,000 year old alien probe located near the star Epsilon Boötis. Lunan later retracted his conclusions, admitting he'd made "outright errors" and characterizing his methods as "unscientific".〔〔〔 In 1954, newspapers ran stories citing a statement by UFO researcher Donald Keyhoe that the US Air Force had reported that two satellites orbiting Earth had been detected. At this time no one had the technology to launch a satellite, however skeptics have noted that "Keyhoe had been promoting a UFO book at the time" and the news stories were likely written "tongue-in-cheek" and not intended to be taken seriously.〔〔 In February 1960 ''TIME'' reported that the US Navy had detected a dark object thought to be a Soviet spy satellite in orbit, however a follow-up article confirmed that the object was "the remains of an Air Force Discoverer VIII satellite that had gone astray".〔〔 In 1963, astronaut Gordon Cooper supposedly reported a UFO during his 15th orbit in Mercury 9 that was confirmed by tracking stations, however critics say there's no evidence that it actually happened.〔〔〔 According to skeptical author Brian Dunning: The story appears in virtually every UFO book about the Black Knight case, but there's no record of any such thing from NASA, from the radar station personnel, or from any contemporary source. It's purely an invention of modern writers.〔 An object photographed in 1998 during the STS-88 mission has been widely claimed to be the Black Knight satellite. According to educator Redpath and space journalist James Oberg, it's more probable that the photographs are of a thermal blanket that was confirmed as lost during an EVA.〔 A British rocket called the Black Knight rocket that was used in conjunction with the Blue Streak missile program between 1958 and 1965 is unrelated to the Black Knight satellite legend.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Black Knight satellite」の詳細全文を読む スポンサード リンク
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