syzygetic
/ˈsɪzɪdʒɛtɪk/Definitions
1. adjective
relating to or characteristic of two or more things that function together as a unit
“The syzygetic relationship between the two celestial bodies led to the formation of a new star.”
2. noun
a pair of complementary things, such as celestial bodies in opposition, that function together as a unit
“The syzygies in the astrological chart indicated a complex and dynamic relationship between the planets.”