Black Knight satellite conspiracy theory

[5] 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.

[5] In 1954, UFO researcher Donald Keyhoe told newspapers that the United States Air Force had reported that two satellites orbiting Earth had been detected.

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.

"[5][12] In 1963, astronaut Gordon Cooper supposedly reported a UFO sighting during his 15th orbit in Mercury 9 that was confirmed by tracking stations, but there is no evidence that this happened.

[5] In 1973, Scottish author Duncan Lunan analysed 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 in an orbit around the Earth's Moon.