syzygy
/ˈsɪzɪdʒi/
noun
- A straight-line configuration of three celestial bodies (such as the sun, Earth, and moon).
- Ancient astronomers carefully tracked syzygies to predict eclipses.
- The spring tides are higher than usual because of the syzygy.
- A solar eclipse occurs during a syzygy of the sun, moon, and Earth.
Synonyms