Answer: syzygy

AnswerCrossword Clue
SYZYGYAlignment of the sun, earth and moon, e.g.
syzygyany two related things, either alike or opposite
syzygythe configuration of the earth, moon and sun lying in a straight line
syzygygroup or combination of two feet, sometimes restricted to a combination of two feet of different kinds
syzygyalignment of three celestial objects, as the sun, the earth, and either the moon or a planet
syzygyan alignment of three celestial objects, as the sun, the earth, and the moon.
SYZYGYCelestial line-up
SYZYGYBlack and white or sun and moon
SYZYGYAlignment of celestial bodies
SYZYGYHighest-scoring Scrabble word that doesn't use A, E, I, O or U
SYZYGYAstronomical alignment
SYZYGYCelestial configuration
SYZYGYAstronomical phenomenon.
SYZYGYEither of two opposing points in an orbit.
SYZYGYOrbit point, in astronomy.
SYZYGYPoint in the moon's orbit, in astronomy.
SYZYGYEclipse cause
SYZYGYThree celestial bodies in a straight line
SYZYGYEclipse lineup