Whether Black Knight is dangerous will depend on whom you ask. Conspiracy theorists argue that the object is a 13,000-year-old extraterrestrial satellite from the star system Epsilon Bootis that Nikola Tesla discovered in 1899. NASA claims that the object in question is nothing more than a thermal blanket that got loose during a space walk.
This object is dangerous mostly for the time that is wasted on it by conspiracy theorists. Unfortunately, more time has been wasted by conspiracy theorists and speculation about this object than all the time lost by those who died prematurely as result of falling space debris.