Relating to the period between two successive conjunctions of a planet or the Moon with the Sun; the time between identical phases as seen from Earth.
From Greek 'synodos' (meeting/assembly) — 'syn-' (together) + 'hodos' (way/path). When celestial bodies 'meet' at the same point in the sky.
A synodic month is the time between full moons — about 29.5 days! It's a celestial MEETING: the Moon and Sun arriving at the same sky-point! Ancient calendars were built on synodic cycles! 🌕🤝☀️
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