Astrology is the study of correlations of celestial events with behavior on earth, particularly correlations which cannot be explained by gravitation, magnetism, or other forces that are well-established in physics or other sciences.

A "celestial event" is any event in the sky. For example, the Sun rising is a celestial event, or any two planets appearing in the same place in the sky is a celestial event. The celestial event can involve any celestial body, whether it be the Sun, Moon, a planet, an asteroid, comet, star, black hole, quasar, or other celestial object. The celestial event may also not involve any physical body at all, such as when, for example, the Moon's North Node (as we shall find out later, the Moon's North Node is not a physical object) is on the eastern horizon.

The eastern horizon is, of course, simply where the sky meets the horizon of the earth in the easterly direction, and therefore is also not a physical body like a planet or star.

Some people mention that the Moon's position affects the tides of the ocean, as an example of an astrological influence, but the correlation of ocean tides with the Moon's position can be explained by gravitation so it is not really astrological in that the rules used by astrologers generally cannot be explained by gravitation or other forces known in the sciences.

Astrology has been used by virtually every advanced civilization for thousands of years, but it has almost always been very controversial as well. Today, skepticism about astrology is as strong as ever, and there are many good reasons for this. Astrology has its roots in ancient times when less scientific methods were employed and superstition was rampant in many of these civilizations. The only exposure that many people have had to astrology is the sun sign columns in the newspaper or a glamorous psychic astrologer on television. Thus, it is hardly surprising that astrology is generally not accepted as a legitimate and valid field of inquiry by academia. Resistance to astrology in academia is strong. The Kepler program and other fine work being done in the field of astrology today will hopefully open the eyes of many people to a valuable tool that is being overlooked.

Some people confuse astrology with astronomy. Astronomy is the science that studies celestial phenomena physically. All objects in the sky are studied in terms of their constitution, position, history, etc. Astronomy, of course, is a science and no one disputes its validity. Astrology goes a step beyond astronomy by making correlations of celestial phenomena with events on earth, and these correlations are not of a nature that can be easily explained by traditional scientific concepts. Astrology is highly controversial, and currently (as of 1998; this may change in the near future) an accredited college degree is not available in astrology, which exemplifies the fact that astrology is currently not well-received in most academic circles.

Note that no one has proven how astrology works. There are many different views on how or why astrology might work, but there is not single conclusive answer that has been demonstrated to the satisfaction of all astrologers. Astrology is the study of the correlation between celestial phenomena and behavior on earth but why should this correlation exist? There are many possible answers and I will not go into those now. Note that the lack of a clear explanation of why the correlation should exist, or the fact that the existence of such a correlation seems absurd to many scientists and non-scientists alike, does not in itself make astrology unscientific. Scientists can analyze correlations and perfect their ability to predict based on these correlations without knowing why the correlation exists. Experts in scientific methodology emphasize that science ultimately is about making observations and theories help us understand the observations. The ability to predict that an apple will fall to the ground if dropped is a scientifically verifiable statement and it does not require the theory of gravitation to make it more scientific. However, the theory of gravitation allows us to understand not only why the apple falls to the ground, but also a myriad other phenomena such as why planets revolve around the Sun and the Moon revolves around the Earth. The power of a scientific theory is that it expands our ability to make predictions about other phenomena, but the lack of good theories does not make a replicable experiment less scientific.

The Signs

Broadly speaking, the 12 signs of the Zodiac can be divided into both masculine and feminine, positive and negative, or, active and passive. The masculine signs are Aries, Gemini, Leo, Libra, Sagittarius and Aquarius, whereas the feminine signs are Taurus, Cancer, Virgo, Scorpio, Capricorn and Pisces.

The Quarternaries

The Quaternaries are three in number - this means that the 12 signs of the Zodiac are divided into three categories of four signs each. They are called the Cardinal signs, the Fixed signs and the Mutable signs.

The Cardinal signs

The Cardinal signs are Aries, Cancer, Libra and Capricorn which are the signs of dynamic change, movement and great vitality.

The Fixed signs

The Fixed signs are Taurus, Leo, Scorpio and Aquarius and relate to stability, earthiness and fixity. The determination of the Fixed signs expresses itself in the form of great willpower.

The Mutable signs

The Mutable signs cover Gemini, Virgo, Sagittarius and Pisces which are the adaptable and interchangeable signs capable of moulding and modifying circumstances and conditions in life.

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