I believe the sun sided with the moon long before man came to roam the earth, that they did so to plunge man into darkness as he'd grown accustom to the light, and to bring him into the dawn just as he'd felt comfort in the dark,
and I believe there's some celestial understanding that no man, philosophical nor mathematical, who could ever be able to explain it in its proper stance, as no man had the proper training in stars and bodies of the skies, for they've existed longer than he.