In comparison with the classical lunar theory the motion of an earth satellite offers important practical differences.

In the lunar theory in Seleucid Period(312B. C-64B. C) of ancient Babylon, the algorithm of latitude of the moon in the moment of syzygies is a complicate question.

One theory is that they came from comets and asteroids, which pounded the lunar surface billions of years ago, and later drifted to the poles.