1. Smaller terms in nutation must also be added to this principal term. 2. Thus, precession is the change in and nutation is the change in. 3. Thus twining plants exhibit both true nutation and nutation due to geotropic sensitiveness. 4. Thus twining plants exhibit both true nutation and nutation due to geotropic sensitiveness. 5. :Well, the largest nutation is only some 20 sec of arc. 6. The polar motion is primarily due to free core nutation and the Chandler wobble. 7. He published a theory of nutation in 1953 that became an international standard model. 8. Use of the " mean " locations means that nutation is averaged out or omitted. 9. A motion in which the second Euler angle changes is called " nutation ". 10. These oscillations, in both precessional speed and axial tilt, are known as the nutation .