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When the Moon's orbital tilt is aligned with the ecliptic tilt, it is 29 degrees from the ecliptic, while when they are anti-aligned (9 years later), the orbital inclination is only 18 degrees.

In addition, the rings of Saturn remain in a fixed direction as that planet rotates around the Sun.

Explanation

Early gyroscopes were used to demonstrate the principle, most notably the Foucault's gyroscope experiment.

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