Syzygy, pronounced SIZ-uh-jee. is a term primarily used in astronomy to describe a roughly straight-line configuration of three or more celestial bodies in a gravitational system. This alignment occurs, for example, when the Sun, Earth, and Moon line up, which happens during conjunction (new moon) or opposition (full moon). Such configurations are responsible for solar and lunar eclipses, as well as certain transits and occultations.
