Precession: The wobble of the Earth's axis. This alters the relationship of the solstices with the distance from the Earth to the Sun.
Precipitation: Liquid or solid water particles that falling from clouds that reaches the ground.
Precession The comparatively slow torquing of the orbital planes of all satellites with respect to the Earth's axis, due to the bulge of the Earth at the equator which distorts the Earth's gravitational field.
Precession(4)
The tendency of the Earth's axis to wobble in space over a period of 23,000 years. The Earth's precession is one of the factors that results in the planet receiving different amounts of solar energy over extended periods of time.
Milankovich cycles Systematic changes in three elements of Earth-sun geometry: precession of the solstices and equinoxes, tilt of Earth's rotational axis, and orbital eccentricity; ...
External processes, such as solar-irradiance variations, variations of the Earth's orbital parameters (eccentricity, precession, and inclination), lithosphere motions, and volcanic activity, are factors in climatic variation.
Climate change may result from such factors as changes in solar activity, long-period changes in the Earth's orbital elements (eccentricity, obliquity of the ecliptic, precession of equinoxes), natural internal processes of the climate system, ...
variations are considered the driving factors underlying the glacial and interglacial cycles of the present ice age. Subtler variations are also present, such as the repeated advance and retreat of the Sahara desert in response to orbital precession.
In 1900, that took 365 days, 5 hours, 48 minutes, and 46 seconds, and it is decreasing at the rate of 0.53 second per century. This decrease is due to the slow precession of the Earth's axis of rotation.
 See also: Earth, Climate, Orbit, Radiation, Period
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