Online chess notation for move precision. !! brilliant, book is literature move, thumbs up an checkmark are good moves, star very good, roughly.

Astrophysicist here, I think you’d enjoy reading about the Hill Sphere and Roche limit. Not quite what you are asking for but comes close.

You like Astronomy/Astrophysics?

Sounds more like a bad watch or setting it up badly. Why would it delete anything anyways before backing it up on secondary media or in general?

Workouts are usually .gpx files which are kB in size. You cannot tell me there is no space on the watch for that. Mine stores all workouts I have ever done.

Actually, having played both… Yes

Believe me GO is worse