Nutation ·
The Nodding of Earth's Axis
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.com · 18.6-year nod · lunar nodes · Earth's core
Period
18.6 yr
Amplitude
±9.2″
Feature
—
Earth & spin axis
Moon & regressing nodes
Nutation ellipse (18.6 yr)
Free Core Nutation
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.com · Nutation — Interactive 3D Animation | Unseel