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free and forced precession of Earth illustrated with a gyroscope

We use a gyroscope to demonstrate how Earth rotates with respect to the fix stars and explain forced and free precession. Image Credits: Earth texture: Reto Stöckli, NASA Earth Observatory https://visibleearth.nasa.gov/images/... ocean currents: NASA/Goddard Space Flight Center Scientific Visualization Studio https://svs.gsfc.nasa.gov/cgi-bin/det... tectonic plates: https://commons.wikimedia.org/wiki/Fi... Earth cross section: Surachit (CC BY-SA 3.0) https://creativecommons.org/licenses/... https://commons.wikimedia.org/wiki/Fi... tides: Bleckneuhaus (CC BY-SA 4.0) https://creativecommons.org/licenses/... https://commons.wikimedia.org/wiki/Fi...