
Is the Black Knight Satellite Real?
In June 1998, during the STS-88 mission, NASA astronauts did capture video footage of a dark, unidentified object outside the Space Shuttle Endeavour. However, upon closer examination, it was determined to be a thermal blanket that had inadvertently floated away from the shuttle. NASA released this information to debunk any claims of extraterrestrial origins. Was that the truth or just a government cover up?
The Black Knight satellite theory is a longstanding claim that an ancient alien spacecraft or satellite has been in Earth’s orbit for thirteen thousand years. According to proponents of the theory, this satellite has been intermittently sending signals to Earth, and various mysterious images have been captured of it over the years.
The origins of the Black Knight legend can be traced back to 1954 when newspapers reported that an unknown object was transmitting signals that were picked up by radio operators. These reports were later attributed to natural space phenomena such as comets or space debris reflecting sunlight, but the conspiracy theory persisted.
NASA and other space agencies have consistently denied the existence of the Black Knight satellite, attributing the sightings and signals to space debris, thermal blankets, or other ordinary objects in orbit. They argue that the alleged images and signals are either misinterpretations, hoaxes, or unrelated events.

From Wikipedia, the following evidence has all been debunked:
A British rocket called the Black Knight rocket was used in conjunction with the Blue Streak missile program between 1958 and 1965, to test re-entry vehicles. A “Black Knight satellite launcher” project announced in 1964 was considered a priority by the Ministry of Aviation. The program never put anything into orbit, and it is unrelated to the Black Knight satellite legend.
In February 1960, Time reported that the U.S. Navy had detected a dark object thought to be a Soviet spy satellite in orbit. A follow-up article confirmed that the object was “the remains of an Air Force Discoverer 8 satellite that had gone astray.”
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. Neither NASA’s mission transcripts nor Cooper’s personal copies show any such report being made during the orbit.
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 in an orbit around the Earth’s Moon. He suggested that the probe may have originated from a planet located in the solar system of star Epsilon Boötis. Lunan later retracted his conclusions, saying that he had made “outright errors” and that his methods had been “unscientific”.