Solar Arc Directions (SAD) are a modern predictive technique used in astrology to track life development and significant events. It is a simplified system compared to Primary Directions and is widely used by contemporary astrologers for its clarity and accuracy.

1. The Concept of Solar Arc Directions

• The method is based on moving all planets and points in the natal chart forward by the same arc of the Sun’s motion.
• The Sun’s annual motion (≈ 1° per year) is used as the arc applied to every planet and angle.
• Each degree of solar arc corresponds to one year of life.

2. How Solar Arc Directions Work

1. Calculate the Solar Arc → the difference between the natal Sun and progressed Sun.
2. Add this arc to every planet, house cusp, and angle in the chart.
3. Interpret when a directed planet or angle makes an aspect (conjunction, square, trine, opposition, etc.) to a natal planet or angle.

3. Practical Use

• Angles (ASC, MC, IC, DSC): When solar arc planets hit these points, major life events often occur (career shifts, relocations, relationships).
• Sun, Moon, Personal Planets: Indicate inner growth, identity changes, emotional or relational developments.
• Outer Planets: Show longer-term transformations, generational influences, and psychological evolution.

4. Advantages of Solar Arc Directions

• Simplicity: One arc applied equally to all chart factors.
• Clarity: Easy to calculate, even without complex astronomical tools.
• Reliability: Considered highly accurate when cross-checked with transits and progressions.

5. Key Interpretive Guidelines

• Solar Arc to Natal: Shows outer events triggered in life.
• Solar Arc to Solar Arc: Reflects psychological and inner growth.
• Works best when combined with transits and progressions for precise timing.

✅ Summary

Solar Arc Directions (SAD) move the entire chart forward by the Sun’s arc (~1° per year). This simple yet powerful predictive technique reveals major turning points in life when directed planets or angles aspect natal points.