astronomical nutation

astronomical nutation

[‚as·trə′näm·ə·kəl nü′tā·shən]
(astronomy)
A small periodic motion of the celestial pole of celestial bodies, including the earth, with respect to the pole of the ecliptic.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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