NASA
Planetary Geodynamics Laboratory: Ocean Tides and the Earth's Rotation
An explanation of the effect that the tides have on the Earth's rotation.
Other
Precession of a Gyroscope and of the Earth's Axis
Describes and calculates the precession of a gyroscope and also discusses the precession of the Earth's axis. Includes several pictures, diagrams, formulas, and details.
Illustrative Mathematics
Illustrative Mathematics: G Mg Tilt of Earth's Axis and the Four Seasons
This task gives students a chance to explore the effects of the Earth's tilt and rotation using a simple geometric model of Earth-Sun interaction that shows why the seasons occur. Aligns with G-MG.A.1.