◆關於太陽弧推運法
By Frank Piechoski
Solar arc directions are an extremely useful tool for the practicing astrologer. They are a viable alternative to other methods of symbolic movement of the natal chart, such as secondary progressions. Ease and effectiveness of use are two key reasons that I use Solar Arc Directions as my main means of forecasting, along with triggers from transiting planets.
To put it simply, a Solar Arc is the angular distance between the natal Sun and the secondary progressed Sun. The secondary progressed Sun is simply taking the position of the sun at birth and symbolically counting forward one day in the ephemeris for each year of life, then taking the new position of the Sun for the desired year as the progressed sun.
In Solar Arc Directions, the Sun is first progressed as in a secondary progression, then the position of the natal Sun is subtracted from it. This number or Arc is then added to all of the bodies and sensitive points of the natal chart, then the Arced placements are compared to the natal placements and exact aspects are noted.
With Solar Arc Directions, the movement of all the planets and points are approximately 1 degree per year, with slight variations depending on the season of the year in which the subject is born. This is what makes them so easy to use.
If you want to see where a particular point is arcing to in your natal chart, you can just take your age, and add that number of degrees to the natal placement and that is where, approximately, the point has arced to. For example, if you have Mars at 0 degrees Aries in your natal chart, at age 25, Mars would be, by Solar Arc Direction, at 25 degrees Aries.
Using this method, you can also look at a chart quickly and see what years were important in clients life. To do this, simply look for planets in the 12th, 3rd, 6th and 9th houses and count how many degrees those planets are from the next angle, and that is an important age.
As a personal example, I have Jupiter in the 12th house in 27 degrees of Sagittarius... and my ascendant is at 13 Capricorn. Subtract the difference between the two and you come up with 16. With Jupiter arcing to the ascendant at that age, would expect a change for the better in personal appearance, a measure of success, and since it is a Capricorn Ascendant with Saturn conjunct it, an increase in public visibility with Jupiter making the Saturnian Ascendant more sociable.