http://www.ancient-code.com/20-facts-black-knight-satellite/
https://en.wikipedia.org/wiki/Epsilon_Bo%C3%B6tis
https://en.wikipedia.org/wiki/Extravehicular_activity
http://www.groundzeromedia.org/2017/02/09/29-black-knight-project-3/
https://theunredacted.com/the-black-knight-satellite-sentinel-from-space/
https://en.wikipedia.org/wiki/Epsilon_Bo%C3%B6tis#/media/File:Bo%C3%B6tes_IAU.svg