The next book in my Sir William & Mac Life Without Slippers is called The Space Snake & the Meteor Named Bob (www.pjgilbers.com). I was researching mythology around snakes and stumbled on this NASA report of a "space snake." https://www.youtube.com/watch?v=rq4MEfqGjb4 It shows up around 3.5. Interesting that they cut it off after a couple of minutes!
If you listen to the astronaut talking it poses the question... what is it, what could it be? Why did NASA cut the feed? Hmmmm.