N
either of the two positions (conjunction or opposition) of a celestial body when sun, earth, and the body lie in a straight line 朔望; 处于这一位置的天体与太阳、地球构成一条直线
In the lunartheory in SeleucidPeriod(312B.C-64B. C) ofancientBabylon, the algorithm of latitude of the moon in the moment of syzygiesisacomplicatequestion.