Word origin · etymology
Latin borrowing.
Latin nutatio means nodding, from nutare, to nod or rock; the name describes the smaller oscillation superimposed on precession.
How we know · epistemology
Observed and modeled motion
Periodic orientation terms refine the broader precession model. Comparing results requires knowing whether nutation is included; adding it improves coordinate consistency, not the evidential status of a reading.
Connected concepts
Terms used in this explanation
Mentioned in 1 other entry
These links connect subjects and terminology. They do not establish a shared historical origin.
Sources & provenance
Use the citations beside each section to distinguish a calculation convention, a historical teaching and an editorial example.