Revered by many people all over the globe and throughout history, the Moon has always been the sky-observer's chief source of omens. Its plainly visible phases that constitute its monthly cycle coordinate with many events on Earth; it could be considered the cornerstone of classical and modern astrology.
In general astrology, the Moon represents so many things, that an entire website could be devoted to it. We give you our one page version here.
The Moon is Earth's satellite, which means that it orbits the Earth and not the Sun. It reflects the light of the Sun, transforming it's spectrum and intensity. The Moon's "day" is the same as its' orbital period, therefore we always see the same image of the Moon, despite the phase the Moon happens to be in. The Moon is responsible for Eclipses, and is therefore the only celestial object that can overpower the Sun, even temporarily.
If you know your Moon sign with certainty, you will probably get better results from reading that sign's horoscope than you will for your Sun sign. The Moon takes an average of 2 ½ days to pass through a given sign of the Zodiac, and takes less than a month to visit all twelve signs.
The Moon regulates the tidal flows of the Earth's water. In fact, if you could make a glass of water stable enough, it would have measurable tides in it; and our bodies are more than 70% water.
All sorts of phenomena can be predicted by the condition of the Moon; animal migrations, crime rates, weather conditions, the flow of blood, and even certain stock market fluctuations have been recorded statistically to coordinate with cycles of the Moon.
Calendars have been built on it, and, despite the Roman Church's disdain of astrology, still calculates the date of Easter on the basis of the spring Equinox and the Moon phase.
The Moon, like the other Luminary, the Sun, has only one sign under its management. That's the sign Cancer.
The sign Cancer is the domicile, or house of the Moon. People born under Cancer therefore express the Lunar characteristics easily and best.
This also applies to those who were born on a day when the Moon was in this sign, or at a time when the Moon was rising or near its' highest point in the sky tend to express its' characteristics better than others. This means that they tend to be more moody and probably more popular than most people.
It's also interesting that people born under Cancer seem to have moods that are linked in some way to the monthly cycle of the Moon. The opposite sign from Cancer, Capricorn, is the place where Lunar characteristics are least prominent. People born in Capricorn tend to be less concerned about others' perception of them, and tend to view their moods as unnecessary, rarely expressing them.
The Moon is exalted in the sign Taurus. People born under this sign typically hold home, family, motherhood and food in very high esteem. They are also highly focused on financial security, because they are as sensitive to the fact that the fortunes of others change often, and they want to be prepared for it.
Scorpio is the sign in which the Moon is fallen, and Scorpio people are known not to be very changeable, as Lunar types typically are. They are also secretive, and seldom allow their emotions to change their minds, once they have decided what they want to do.
In a birth-horoscope, the Moon is said to represent the subconscious mind, the feelings (emotions), habits and moods, the mother, home and family, and women in general.
The Moon can also represent childhood, and much about the past can be told from its' relationships with the other planets.
It is known to have a great deal to do with long-term memory; while the sign Cancer represents the stomach, which converts food into energy, the Moon itself represents the body's fluids and also the gray matter of the brain.
The Sun represents what you do, while the Moon represents what happens to you; therefore, it represents one's fortune, good or bad, to a large degree. In the Indian system of astrology, and to some degree, the Hellenistic or ancient Greek/Egyptian system upon which modern astrology is patterned, the Moon is the basis of many methods of prediction.
It also represents one's public image, and has a lot to do with the popularity and relationship compatibility in birth horoscopes.
In men's horoscopes, the Moon represents relationships with women, and this is only logical, because the relationship with the mother usually sets the pattern for relationships with women as one grows up.
Men with the Moon dominant in their complete charts tend to be less aggressive in business and competition, and are known for their "people skills" or for having the "common touch" that enables them to get along with others.