syzygy
noun syz·y·gy \ˈsi-zə-jē\
plural syz·y·gies
Definition of SYZYGY
: the nearly straight-line configuration of three celestial bodies (as the sun, moon, and earth during a solar or lunar eclipse) in a gravitational system
Syzygy…I have never heard it or seen it before
Published
How my heart sings 
Yes! Have heard of it…via astronomy…… 😉