Astrology is the most ancient system of knowledge elaborated by human beings. In fact Astrology has not only been the first Science to deal with the External World, the physical One, but also the first one to deal with the Internal World, the Spiritual One. The World of the Mind and Soul.
The Earth, and with her human beings, are tied up in a spiral of rotating motion. Motions which are the same as those of the Earth, where night follows day, winter, spring, the planetary orbits; and finally the slow movement of the terrestrial axis in relation to remote constellations. To the eye that observes them from the Earth all these motions are inserted in a circumference of 360 degrees called the Zodiac. This band is divided in 12 sectors of thirty degrees, where each sector corresponds to a stage, each one is step towards the inexorable process of light and darkness, of summer and winter, of birth and death, of the ascent and decline and all that exists on the Earth. Astrology studies the motions of the solar system, their different positions in the zodiacal circle and the possible influences on terrestrial events and on the nature of human beings.
The fundamental hypothesis of astrology is that any one of these rotating motions, entering a determined sector of the Zodiac, absorbs the particular nature of it and will influence it in turn. The ancients distinguished twelve constellations in the zodiacal zone and named the Zodiac accordingly.

This denomination points to a symbolic correspondence and not a real one.
The different constellations, in fact, often occupy a space greater or smaller than the 30 degrees assigned to them in each zodiacal sector and in the present day their positions have changed.
The beginning of the Zodiac coincides with the spring equinox, the moment of nature awakening, the first sector is called Aries. Because of the procession of equinoxes, (which occurs every 2160 years), the constellation of Aries does not shine over the Sun from the 21 of March to the 20 of April anymore, nowadays the Vernal Point (Equinox of Spring) will shine on the 29° of the Aquarius for 72 years, from that point on, we entered the age of Aquarius and the culture of New Age.
Astrologers are to the opinion that each bi-millenarian period is marked by the characteristics of the zodiacal sector which is passing over the Vernal Point (the Eras of the World and the procession of the Equinoxes).
Two thousand years ago, there was the entrance of the Vernal Point in the Sign of Pisces; it's not a coincidence that the sign of identification for the Christians in the beginning wasn't the cross but the Pisces (jesus Cristus Theos Uios Soter = I.C.T.U.S.= in latin means Pisces).
This symbol was drawn on walls to indicate to early Christians the location of secret meetings.

The twelve Sectors of the Zodiac are symbolically named according to the 12 constellations; in the order: Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpio, Sagittarius, Capricorn, Aquarius, and Pisces. From Aries which marks the beginning at zero degrees, and arriving at 360° which marks the end of Pisces. The passage from one sector to another occurs precisely every thirty degrees, this is formulated without taking into consideration the dimensions or the actual position of the constellation from which they derive, a circumstance which as explained earlier, has only a symbolic value.

In fact this subdivision is established on the basis of the seasonal cycles, with reference to the equinoxes of spring and autumn, and the solstices of summer and winter.

According to the Astrological tradition, the zodiacal signs have different natures and belong to the 4 groups of the classical elements: fire, earth, air, water, (the fifth element ether, is considered to pertain to esoteric astrology).

These signs represent the three material layers of the 4 elements.

FIRE:          Aries is the exalted Fire, the match;
                   Leo is the vital Fire, the bonfire
                   Sagittarius is the attenuated Fire, the ardent coal.

EARTH:      Taurus is the plentiful Earth
                    Virgo is the Earth of harvest
                    Capricorn is the hard Earth of winter

AIR:            Gemini  Gemini is the proud Air;
                    Libra Libra is the sweet Air;
                    Acquarius Acquarius is the fervent Air.

WATER:     Cancer is the calm Water, the shores of lakes and seas;
                    Scorpio is the stagnant water;
                    Pisces is the live and fertile Water, the Water of the Abyss.

The Cardinal Signs are present at the beginning of each season. Aries fixes the Equinox of Spring, Libra fixes the Equinox of Autumn, Cancer marks the passage of the solstice of Summer, and Capricorn marks the solstice of Winter.

The fixed Signs are present at the height of each season, they constitute the centre of them . These are; Taurus that marks the centre of Spring, Leo of Summer, Scorpio of Autumn, Aquarius of winter.

The Mobile Signs are those which mark the passage from one season to another and therefore are the most susceptible to change in the Zodiac. Cancer marks the arrival of Summer, Libra of Autumn, Capricorn of Winter and Pisces of Spring.
All the Planets of the Solar System occupy ever changing positions in the Zodiac, this effect is caused by the different speeds of their orbits, which take longer to complete as the distance from the sun increases. In their movement, the planets determine the energy and the quality of the different phases of Time in which we live. They keep in motion the forces that govern the game of life. They keep in motion the forces that govern the game of our life.
The Earth, through a complete turn of its axis, determines the duration of 1 day. The Moon, orbiting around the Earth roughly determines the duration of 1 Month. The orbit of the Earth around the Sun the duration of 1 Year. The Saturn Cycles, Kronos, or Time control the phases of our life. The movement of Uranus the average life of a man: 84 years.

Each Planet during its orbit receives and emits forces, which transmit a particular energy wave, which is necessary to maintain order in the Solar system.

From the moment of our birth It is possible to know the quality of our future life, as it is possible to know what type of tree will grow from a seed.