The verb to nutate was used by MIT physicist Peter Fisher on the television show Late Night with Conan O'Brien on February 8, 2008.
nutation |
The exact instants of equinoxes or solstices are the times when the apparent ecliptic longitude (including the effects of aberration and nutation) of the Sun is 0°, 90°, 180°, or 270°.
He corresponded with James Bradley, was the first to represent the effects of nutation in the solar tables, and introduced, in 1741, the use of the transit-instrument at the Paris Observatory.