This entry lacks etymological information. If you are familiar with the origin of this term, please add it to the page as described here.
Particularly: “The WP article directly contradicts this, suggesting the sense of fixed: not moving has been part of this term from the beginning. C.f. Latinstellae fixae (“fixed stars”). Can anyone confirm / clarify?”
From earlier fixed star (“comet, meteor”), alteration of faxed star. Change in meaning influenced by fixed (“stationary, remaining in place”).