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regression of the nodes
subjectfact 
regression of the nodeshas definition The slow (19°.35 per year, 360° in 18.6 years), westward motion of the nodes of the Moon's orbit due to perturbations of the Earth and Sun.has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:29:52.0
is a kind of motion2001-09-27 09:29:52.0
physical processhas domain physics2001-09-27 09:29:38.0