Astronomical Cycles and Climate Impact

astronomical cycles of secondary importance, but with relevant climate impacts, derived from the interaction of the Earth-Sun system with other celestial bodies. Of particular importance is the cycle of terrestrial axial inclination which, stabilized by the Moon, varies from $22°20'$ to $24°30'$ with a period of $41,040$ years;

solar activity cycles: the solar magnetic activity cycle is of fundamental importance for life on Earth since the heliosphere protects Earth from extraterrestrial influences and cosmic rays. An almost periodic change in the Sun's activity occurs every $11$ years and is related to the number of spots on the solar surface. Alongside this cycle there are others of secondary importance, the most relevant of which has a period of $2400$ years;

aperiodic cycles of the terrestrial magnetic field: the thermal gradient between the solid core and liquid core of the Earth generates, through powerful convective motions, a powerful magnetic field that protects Earth from cosmic rays and solar wind. Since the Earth's magnetic field is dictated by a turbulent motion inside the Earth, its orientation is not fixed, but reverses aperiodically. The last important event in chronological order is the so-called Laschamps event consisting of a very brief reversal of the poles of $700$ years that occurred $42,000$ years ago in conjunction with a maximum of solar activity.

To these classical cycles must then be added all those sporadic events such as, for example, the Carrington event, or adjustments of the Earth's crust, or impact with meteoritic objects which, while not being periodic, can have a value of discontinuity and conclusion of a cycle.

For the time interval we analyzed, of maximum importance will be the Platonic year of $26,000$ years and stellar action modulated by the precession of equinoxes and the corresponding cycle of zodiacal eras.

The Age of Aquarius and Clarifications on the Precession of Equinoxes

It is said that we are in the Age of Aquarius to which considerable importance is attributed for its presumed influence on the destiny of Humanity. The news cannot amaze, if we reflect that the biological, mental, emotional and spiritual development of individuals both single and taken as collectivity, is influenced by supernatural forces and by the natural astronomical forces of our Solar and Galactic System.

Even socio-economic facts and extrasensory faculties of mystics and Initiates do not escape the laws of the Cosmos, so that man's freedom is conditioned by the Whole. Therefore among the cosmic causes influencing the evolution of peoples, stand in the foreground the Zodiac of Constellations and the vibrational and rational one of the Signs.

When discussing Zodiacal Eras of Pisces or Aquarius, or some other sector of the Zodiac, reference is made to the astronomical phenomenon of the Precession of Equinoxes. These are nothing other than two intersection points between the celestial Equator and the Ecliptic, due to an inclination of $23° 27'$ of the terrestrial axis or equatorial axis.

There are two equinoxes, the vernal or spring one, and the autumnal one. They are crossed by the Sun on March $21$-$23$ (vernal E.) and September $23$ (autumnal E.): solar crossing due to the spherical geometry perspective motivated by Earth's motion.

The phenomenon of Precession was already known in $150$ BC to Hipparchus, one of the most famous and great astronomers of antiquity, who noticed the change in celestial longitudes.