Things About Zodiac

The concept of the zodiac was originally proposed by the Babylonians before 2000 BC C., as a schedule to be displayed over time.
Experts say that the trail of the origin of our constellation is found among the Sumerians, but it is the priest-astronomers or astrologers if you will, of ancient Egypt who reported their observations of the sky to the Greeks, who in turn were a source of knowledge for astronomers and scientists from the Middle Ages.
In astrology, the zodiac constellations defined by the twelve zodiacal signs used historically as a method of divination and preparation of horoscopes. The sign present at the time of birth is linked to the being who had just been born, "brand" for life.
The twelve signs as we know them today were listed by the Greek astronomer Claudius Ptolemy in the second century, based on the Sumerian astrological system.
Although we use the same names for the twelve astrological signs that twelve of the fourteen astronomical constellations of the zodiac, there is a significant difference. While the signs are geometric sections of equal size, each spanning 30 ° and corresponds to a period of approximately one month, the constellations have irregular shapes, not in any case both correspond

The constellations of the zodiac, unlike the rest of the sky are those along which the Sun, Moon and planets on their journey in the sky throughout the year. The Zodiac "the way of animals," consists of 12 constellations are: Aries, Aquarius, The Crab, The Goat Marina, The Scorpion, The Twins, The Lion, The Fishes, El Toro, La Balance, Sagittarius and Virgin, not to mention the constellation of Ophiuchus "The Serpent", which some consider him the 13th constellation of the Zodiac. The mythological origin of their names and icons that represent them, are part of the beginning of human culture and astronomy.

Name Sym. Dates

Aries		21 de march - 20 de april
Taurus		21 de april - 19 de may
Gemini		20 de mayo - 19 de junio
Cancer		20 de june - 21 de july
Leo		22 de july - 21 de august
Virgo		22 de august - 21 de september
Libra		22 de september - 22 de october
Scorpio		23 de october - 22 de november
Sagittarius		23 de november - 20 de december
Capricorn		21 de diciembre - 19 de enero
Aquarius		20 de enero - 18 de febrero
Pisces		19 de febrero - 20 de marzo
Ophiuchus		30 de noviembre - 17 de diciembre

In a triplicity zodiac consists of three zodiacal signs that have a common element.

Aries, Leo, Sagittarius: Fire
Taurus, Virgo, Capricorn: The earth
Gemini, Libra, Aquarius: Air
Cancer, Scorpio, Pisces: Water

Each of the three signs share the same element has an affinity with the other two.

The Zodiac has not twelve but thirteen or fourteen constellations (according to different interpretations). That is, the solar disk passes through thirteen constellations different in the course of a year. The thirteenth is Ophiuchus, where the solar disk is late November to mid December. Also, some consider the inclusion of a constellation known as Cetus fourteenth, as it houses part of the solar disk for a few hours in late March (flick the band of the zodiac), but because of these characteristics are presented in Cetus, their inclusion is under discussion.
Today the zodiac constellations are useful and known by ordinary people just for the horoscope. Many people read these forecasts every day in internet, newspapers or magazines.