Black Knight Satellite
A conspiracy theory claiming an ancient alien satellite of unknown origin orbits Earth, based on misinterpreted data and photos.
Documented record
Known Facts
The Black Knight Satellite theory claims an object of unknown origin orbits Earth.
The theory conflates several unrelated events: Tesla's 1899 radio signals, a 1954 UFO report, and a 1998 NASA photo.
The 1998 NASA photo that popularized the theory was actually of a thermal blanket lost during a spacewalk.
No scientific evidence supports the existence of an ancient alien satellite.
The object's supposed 13,000-year orbit is physically impossible given orbital decay.
Supporting claims & documentation
Evidence For
Tesla's 1899 Radio Signals
TESTIMONYTesla claimed to have detected repeating radio signals he thought might be from Mars.
SOURCE:Nikola Tesla writings
1954 UFO Report
SECONDARY SOURCETwo UFO researchers claimed the U.S. Air Force identified two unknown satellites.
SOURCE:UFO research publications
Counterpoints & criticisms
Evidence Against
NASA Photo Identification
PRIMARY SOURCENASA identified the 1998 photo as a thermal blanket lost during STS-88.
SOURCE:NASA / ESA
Orbital Mechanics Impossibility
ANALYSISA 13,000-year-old satellite could not maintain a stable low Earth orbit.
SOURCE:Orbital mechanics / Physics
Unresolved inquiries
Open Questions
What was the origin of the 1954 'unknown satellite' reports?
Why did the theory persist after NASA's explanation?
Are there any genuinely unidentified objects in Earth orbit?
Chronological record
Timeline
Tesla reports mysterious radio signals.
UFO researchers claim discovery of unknown satellites.
NASA photo of thermal blanket misinterpreted as alien satellite.
Theory spreads widely on the internet.
Connected dossiers
Related Investigations
References & further reading
Sources
Automatically discovered links
Related Connections
U.S. Air Force appear in both.
2 organizations appear in both.
NASA appear in both.