Astrology (from Greek: αστήρ, αστρός {astér, astrós}, "star"; and λόγος, λόγου{lógos, lógou}, "word" or "speech") is a group of systems, traditions, and beliefs in which knowledge of the relative positions of celestial bodies and related details is held to be useful in understanding, interpreting, and organizing information about personality, human affairs, and other terrestrial matters. A practitioner of astrology is called an astrologer, or, less often, an astrologist. Historically, the term mathematicus was used to denote a person proficient in astrology, astronomy, and mathematics.

Although the two fields share a common origin, modern astronomy is entirely distinct from astrology. Astronomy is the scientific study of astronomical objects and phenomena, whereas astrology is concerned with the attempt to correlate these phenomena with earthly affairs. Astrology is variously considered by its proponents to be a symbolic language, a form of art, science, or divination. The scientific community generally considers astrology to be a pseudoscience or superstition as astrologers have failed empirical tests in controlled studies. Despite the lack of scientific evidence, belief in astrology is widespread.

The core beliefs of astrology were prevalent in most of the ancient world and are epitomized in the Hermetic maxim "as above, so below". Tycho Brahe used a similar phrase to justify his studies in astrology: suspiciendo despicio, "by looking up I see downward". Although the principle that events in the heavens are mirrored by those on Earth was once generally held in most traditions of astrology around the world, in the West there has historically been a debate among astrologers over the nature of the mechanism behind astrology. The debate also covers whether or not celestial bodies are only signs or portents of events, or if they are actual causes of events through some sort of force or mechanism.

Although the connection between celestial mechanics and terrestrial dynamics was explored first by Isaac Newton with his development of a universal theory of gravitation, claims that the gravitational effects of the celestial bodies are what accounts for astrological generalizations are not substantiated by scientific research, nor are they advocated by most astrologers.

A common belief held by astrologers is that the positions of certain celestial bodies either influence or correlate with human affairs. A modern explanation is that the cosmos (and especially the solar system) acts as a single unit, so that any happening in any part of it inevitably is reflected in every other part, somewhat representing chaos theory. Skeptics dispute these claims, pointing to a lack of concrete evidence of significant influence of this sort.

Most astrological traditions are based on the relative positions and movements of various real or construed celestial bodies and on the construction of celestial patterns as seen at the time and place of the event being studied. These are chiefly the Sun, Moon, the planets, the stars and the lunar nodes. The frame of reference for such apparent positions is defined by the tropical or sidereal zodiacal signs on one hand, and by the local horizon (ascendant) and midheaven on the other. This latter (local) frame is typically further divided into the twelve astrological houses. Furthermore, the astrological aspects are used to determine the geometric/angular relationship(s) between the various celestial bodies and angles in the horoscope.

The claim of astrology to predict future trends and developments, or predictive astrology, is based on two main methods: astrological transits and astrological progressions. In transits the ongoing movements of the planets are interpreted for their significance as they transit through space and the horoscope. In astrological progressions the horoscope is progressed forward in time according to set methods. Most modern astrologers no longer try to forecast actual events, but focus instead on general trends and developments. Skeptics respond that this allows astrologers to avoid making verifiable predictions, and gives them the ability to attach significance to arbitrary and unrelated events, in a way that suits their purpose.

In the past, astrologers often relied on close observation of celestial objects and the charting of their movements. Modern astrologers use data provided by astronomers which are transformed to a set of astrological tables called ephemerides, showing the changing zodiacal positions of the heavenly bodies through time.

There are many traditions of astrology, some of which share similar features due to the transmission of astrological doctrines between cultures. Other traditions developed in isolation and hold completely different doctrines, although they too share some similar features due to the fact that they are drawing on similar astronomical sources.

Current traditions

The main traditions used by modern astrologers are:

*
o Indian astrology
o Western astrology
o Chinese astrology

Indian and Western astrology share a common ancestry as horoscopic systems of astrology and are essentially similar in content. Both traditions focus on the casting of an astrological chart or horoscope, a representation of celestial entities, for an event based on the position of the Sun, Moon, and planets at the moment of the event. The main difference between the two traditions is that Indian astrology uses the sidereal zodiac, linking the signs of the zodiac to their original constellations, while Western astrology uses the tropical zodiac (see section below). Because of the phenomenon of the precession of the equinoxes, over the centuries the twelve zodiacal signs in Western astrology no longer correspond to the same part of the sky as their original constellations. In effect, in Western astrology the link between sign and constellation has been broken, whereas in Indian astrology it remains of paramount importance.

In Chinese astrology a quite different tradition has evolved. By contrast to Western and Indian astrology, the twelve signs of the zodiac do not divide the sky, but rather the celestial equator. The Chinese evolved a system where each sign corresponds to one of twelve 'double-hours' that govern the day, and to one of the twelve months. Also most notably and uniquely, each sign of the zodiac governs a different year, and combines with a system based on the five elements of Chinese cosmology to give a 60 (12 x 5) year cycle. The term Chinese astrology is used here for convenience, but it must be recognised that versions of the same tradition exist in Japan, Vietnam, Thailand and other Asian countries.

In modern times, these traditions have come into greater contact with each other, notably with Indian and Chinese astrology having spread to the West, while awareness of Western astrology is still fairly limited in Asia.

Historical traditions

Throughout its long history, astrology has come to prominence in many regions and undergone developments and change. There are many astrological traditions that are historically important, but which have largely fallen out of use today. Astrologers still retain an interest in them and regard them as an important resource. Historically significant traditions of astrology include:

* Arab and Persian astrology
* Babylonian astrology
* Celtic astrology
* Chinese astrology
* Egyptian astrology
* Hellenistic astrology
* Indian or Vedic astrology
* Mesoamerican:
o Aztec or Nahuatl astrology
o Maya astrology

The Mesoamerican traditions are included here because although they have not been widely used in their full form since pre-Columbian times, there is evidence that they have survived in some form as a living tradition up to the present day, particularly among the Maya. Aztec and Maya astrology recall the Chinese system, but use a more complex calendar scheme. These systems offer additional evidence concerning the original migration of native peoples from Asia to America. The history of Western, Chinese, and Indian astrology is discussed in the main article history of astrology.

Many mystic or esoteric traditions have links to astrology. In some cases, like Kabbalah, this involves participants incorporating elements of astrology into their own traditions. In other cases, like divinatory tarot, many astrologers themselves have incorporated the tradition into their own practice of astrology. Esoteric traditions include, but are not limited to:

* Alchemy
* Germanic Runes
* Kabbalah
* Numerology
* Chiromancy
* Rosicrucian or Rose Cross
* Tarot divination

Historically, alchemy in the Western World was particularly allied and intertwined with traditional Babylonian-Greek style astrology; in numerous ways they were built to complement each other in the search for occult or hidden knowledge. Astrology has used the concept of the four classical elements of alchemy from antiquity up until the present day. Traditionally, each of the seven planets in the solar system known to the ancients was associated with, held dominion over, and "ruled" a certain metal.

Recent Western developments

Astrology in the Western world has diversified greatly in modern times. New movements have appeared, which have jettisoned much of traditional astrology to concentrate on different approaches, such as a greater emphasis on midpoints, or a more psychological approach. Some of its subsets include:

* Modern tropical and sidereal horoscopic astrology
* Cosmobiology
* Psychological astrology or astropsychology
* Financial astrology
* Sun sign astrology
* Hamburg School of Astrology
o Uranian astrology, subset of the Hamburg School

The zodiac is the belt or band of constellations through which the Sun, Moon, and planets move on their journey across the sky. Astrologers noted these constellations and so attached a particular significance to them. Over time they developed the system of twelve signs of the zodiac, based on twelve of the constellations they considered to be particularly important. The Western and Indian zodiac signs have a common origin in the tradition of horoscopic astrology, and so are very similar in meaning. In China on the other hand, the development of the zodiac was different. Although the Chinese too have a system of twelve signs (named after animals), the Chinese zodiac refers to a pure calendrical cycle, as there are no equivalent constellations linked to it like the Western or Indian zodiacs. The common choice of twelve zodiac signs is understandable when it is considered that the interaction of the Sun and Moon was central to all forms of astrology. Thus, twelve cycles of the Moon — the months — coincided with one solar year, making twelve a natural choice.

The majority of Western astrologers base their work on the tropical zodiac which divides the sky into twelve equal segments of 30 degrees each, beginning with the first point of Aries, the point where the line of the earth's celestial equator and the ecliptic (the Sun's path through the sky) meet at the northern hemisphere spring equinox. Due to the precession of the equinoxes, the slow changing of the way Earth rotates in space, the zodiacal signs in this system bear no relation to the constellations of the same name but stay aligned to the months and seasons. Because of its connection to old locations of constellations, the tropical zodiac is used as a historical coordinate system in astronomy.

Practitioners of the Indian astrological tradition and a minority of Western astrologers use the sidereal zodiac. This zodiac uses the same evenly divided ecliptic but approximately stays aligned to the positions of the observable constellations with the same name as the zodiacal signs. The sidereal zodiac differs from from the tropical zodiac by an offset called the ayanamsa which steadily increases as the equinoxes drift further.

Horoscopic astrology is a very specific and complex system that was developed in the Mediterranean region and specifically Hellenistic Egypt around the late 2nd or early 1st century BCE. The tradition deals with two-dimensional diagrams of the heavens, or 'horoscopes', created for specific moments in time. The diagram is then used to interpret the inherent meaning underlying the alignment of celestial bodies at that moment based on a specific set of rules and guidelines. This is normally done for the moment of birth of an individual, or at the beginning of an enterprise or event, because the alignments of the heavens at that moment are thought to determine the nature of the subject in question. One of the defining characteristics of this form of astrology that makes it distinct from other traditions is the computation of the degree of the Eastern horizon rising against the backdrop of the ecliptic at the specific moment under examination, otherwise known as the ascendant. Horoscopic astrology has been the most influential and widespread form of astrology across the world, especially in Africa, India, Europe, and the Middle East, and there are several major traditions of horoscopic astrology including Indian, Hellenistic, Medieval, and most other modern Western traditions of astrology.

The horoscope
A computer-generated Western horoscope.
A computer-generated Western horoscope.

Central to horoscopic astrology and its branches is the calculation of the horoscope or astrological chart. This two-dimensional diagrammatic representation shows the celestial bodies' apparent positions in the heavens from the vantage of a location on Earth at a given time and place. The horoscope is also divided into twelve different celestial houses which govern different areas of life. Calculations performed in casting a horoscope involve arithmetic and simple geometry which serve to locate the apparent position of heavenly bodies on desired dates and times based on astronomical tables. In ancient Hellenistic astrology the ascendant demarcated the first celestial house of a horoscope. The word for the ascendant in Greek was horoskopos from which "horoscope" derives. In modern times, the word has come to refer to the astrological chart as a whole.

Branches of horoscopic astrology

Traditions of horoscopic astrology can be divided into four branches which are directed towards specific subjects or purposes. Often these branches use a unique set of techniques or a different application of the core principles of the system to a different area. Many other subsets and applications of astrology are derived from these four fundamental branches.

* Natal astrology, the study of a person's natal chart to gain information about the individual and his/her life experience.
* Katarchic astrology, which includes both electional and event astrology. The former uses astrology to determine the most auspicious moment to begin an enterprise or undertaking, and the latter to understand everything about an event from the time at which it took place.
* Horary astrology, used to answer a specific question by studying the chart of the moment the question is posed to an astrologer.
* Mundane or world astrology, the application of astrology to world events, including weather, earthquakes, and the rise and fall of empires or religions.

Wikipedia

No.

Great poll Nina, this will get some interesting debate

I am Cancer in the Zodiac and a Monkey in the Chinese Year

I like to have fun and play around but also can be serious and sensitive

What about you Nina and Geoff

Well, I´m Taurus in the Zodiac and Horse in in the Chinese astrology.
Like the Phil I like to have fun and play, also I´m sensitive, easily hurt, romantic, thoughtful, caring, peaceful, trustworthy, generous, loyal but also can be stubborn and sometimes lazy