Astrology is the
study of celestial bodies’ effect on human affairs, personality, and natural
events. Astrologists hold that all
things are intertwined with the rest of the cosmos; therefore, celestial events
reflect human happenings. Using this principle, they practice divination by creating elaborate prediction charts called horoscopes; natal horoscopes
are most popular, centering on an individual’s personality and destiny
based on time and place of birth.
The planets’ positions drive astrological predictions. To
orient the heavens, astrologists utilize earth’s ecliptic. Although the earth orbits the sun, on earth, it appears the sun, planets, and stars rotate around us; the ecliptic is the imaginary disk-plane in which these heavenly bodies
orbit earth.
In astrology, the ecliptic divides into 12 even pie-slice
zones called the zodiac, named after
the ring of constellations that line
the “border” of the ecliptic. Because each zodiac occupies a twelfth of the
ecliptic, the sun sends a twelfth of the year in each zone. A person’s sun sign (or star sign) is determined by what zodiac the sun occupies at his
time of birth, and implies certain personality traits. For example, Taurus sun signs are considered
stubborn, cautious, and dependable. Most magazine horoscopes use sun sign astrology, relying entirely on the sun sign to make
personal predictions. Traditional astrologists critique this approach for
ignoring the many other astrological influences.
The ecliptic also divides
into 12 Houses. In natal astrology,
at the time of the subject’s birth, the Houses are numbed counterclockwise from
the eastern horizon. Each House
governs a different aspect of life; the planets in each House when the subject
is born determine his traits. For example, if Neptune – associated with idealism and personal dreams – is in the Second House – the House of Value – the subject may have idealistic (unrealistic) money
sensibilities.
The positions of planets relative to each other – or aspects – are also an important
consideration. For example, if two planets are roughly 90° from each other, they’re said to be square (in opposition). This represents stressful conflict between the qualities these planets
govern.
When the zodiac was first defined in the Babylonian calendar (first millennium
BCE), the sun appeared over the constellation Aries during March’s vernal (spring) equinox, the beginning of their year. Tropical astrologists hold firmly to these ancient parameters. However, because the earth’s axis is tilted,
it’s actually wobbled away from this original position; the sun now passes through
Aries about 24 days later. Sidereal
astrologists account for this change in their horoscopes. Although debate between
these two schools has raged for years, it seems not even the stars can tell
which school – if either – is right.