Lunation, Synodical

Definition

A synodical lunation is the cycle formed by the changing angular relationship between the Moon and the Sun as viewed from Earth. It begins at the New Moon, when the luminaries conjoin, develops through the waxing phases and Full Moon opposition, and ends at the following New Moon. This synodic month lasts approximately 29.5 days.

Astrological Meaning

Astrologers use the synodical lunation to study cycles of emergence, development, culmination, release, and renewal. The zodiacal sign and house of a New Moon may describe the life area in which a fresh emphasis is forming, while the Full Moon can bring heightened awareness or a turning point within the same cycle. Aspects from a lunation to natal planets may personalize its symbolism. Interpretation should also distinguish the Moon’s synodic phase from its daily motion, sign placement, and other lunar cycles.

Why It Matters

Following synodical lunations provides a practical timing framework without requiring fixed predictions. The cycle can help organize reflection, planning, and review around recurring lunar phases. In natal or mundane work, it also places individual New and Full Moons within a broader sequence, allowing astrologers to compare beginnings with later developments and outcomes.

Related Encyclopedia Entries

• Traditional Astrology
• Astrological Terminology
• Natal Chart
• New Moon
• Full Moon
• Lunar Phases