As per reader request I’ll talk about progression methods for a bit. Noel Tyl has written extensively about his method of prediction in Solar Arcs: Astrology’s most successful predictive system. The book is actually a summary of his predictive method incorporating transits, Solar Arcs, Secondary Progressed Moon, as well as Tertiary Progressed Moon.
Solar Arc over Secondary Progression?
Noel has also written a book about Secondary Progression early in his career, but now he prefers the Solar Arc method as the more reliable method. There are many fine astrologers using Secondary Progression as their tool of choice, so both methods are here to stay.
One of the key difference between the two methods is that in Solar Arc you get to advance the slower moving planets (Saturn onward) that hardly moves in the Secondary Progression method, so this tends to add more interpretive possibilities when forecasting.
Difference between transiting and Solar Arc planets
Solar Arc planets move at the speed of Secondary Progressed Sun, which is approximately one degree per year. This means even a fast planet like Venus will have a longer time frame (say 9 months) to be in orb using a Solar Arc method: this means Solar Arc of Venus to the Sun (written Venus=Sun) would last for 9 months, strongly suggesting the success of a relationship or an artistic endeavor.
In transit, Venus moves so fast that it can’t have much of an impact except for a couple days of pleasantness. Similar thing can be said of Jupiter, whose transit is fleeting but under the Solar Arc, suggests a 9 months period in which reward or opportunity is likely to be presented.
Solar Arc is relatively easy to test in your own horoscope: add 1 degree per year to the natal planets to see how they move and form an aspect with the natal planet. The orb needs to be exact (less than one degree) in order for the Arc to be in effect, and we count conjunction, square and opposition only.
If natal ASC is at 12 Leo, and natal Saturn is at 22 Leo, this means Solar Arc ASC will conjoin Saturn at age 10 (we write ASC=Sat to denote this period), then we ask if there had been a status change within the family around that age: some Saturnian event such as death in the family, sickness, move, or change in father’s position, etc.
A Major Principle – Looking for the Big Bells
“Nothing important happens in life unless the Angles, Sun, or the Moon is involved.” – Noel Tyl
We give special importance to the transits or Solar Arcs to these hot trigger points (as well as one other point called the Sun/Moon midpoint) by slower planets (Saturn through Pluto), since they tend to correspond with major life changes most often.
In the next post we will explore some interpretive principles for Solar Arc planets.