Black Knight Risesnasa's Unexplained Files : Se... -

The "Black Knight Satellite" legend, featured in "NASA's Unexplained Files," alleges an ancient extraterrestrial probe, but it is actually a thermal blanket lost during the 1998 STS-88 mission. While often described as a 13,000-year-old alien craft, NASA identified the object in the famous photo as debris that subsequently burned up in the atmosphere.