Astrology is in NO way tied to physics (You're thinking Astronomy ...)
I disagree. Astrology is tied to the planets, specifically the movement thereof in relation to one another and those effects on influencing human behavior. Movement of a planet is influenced by physics.
Imagine a rubix cube whose faces are aligned: the puzzle solved. This is the world of the familiar. A few short twists and turns and those same ordered faces become jumbled and chaotic, impenetrable to all but the most cunning.