Solar Arc
A predictive method that moves all natal points about 1° per year.
Solar arc directions move every natal point forward by roughly one degree per year. This simple system is used to time life events, especially when a directed planet or angle makes an exact contact to a natal planet or angle.
Example
Solar arc Sun conjunct natal Midheaven often coincides with a career milestone or visibility shift.
Cultural Context
Solar arc directions originated in the work of 17th-century astrologer Placidus de Titis and were popularized in the 20th century by Noel Tyl. The technique's simplicity (all points move at the same rate) makes it easy to calculate and remarkably effective for timing major life events. It's especially popular in European astrological traditions.
Famous Example
Noel Tyl demonstrated solar arc effectiveness by studying hundreds of timed charts. He found that solar arc Midheaven conjunct natal Sun consistently correlated with career breakthroughs and public recognition — making it one of the most reliable timing indicators for professional milestones.
Did You Know?
Solar arc directions move every chart point by the same amount (roughly 1° per year), meaning your solar arc Ascendant, Midheaven, and all planets advance together. At age 30, everything has moved ~30°, or one full sign. This creates a natural '30-year cycle' where your entire progressed chart shifts one sign forward.