A synastry chart is a comparative overlay of two natal charts. Aspects are the angles planets make with each other, typically 0°, 30°, 60°, 90°, 120°, and 180°. Each angle carries a meaning, from supportive conjunctions to challenging squares, indicating how energies between partners interact.
In practice, astrologers look at the distribution of favorable and unfavorable aspects across key planets—Sun, Moon, Venus, Mars—and personal points. The balance of these influences suggests whether a partnership feels effortless, transformative, or strained, guiding whether you align with your long‑term goals.