The term "sep 11 astrology" functions as a noun phrase. In this construction, "astrology" is the head noun, which is being modified by the attributive noun "sep 11." This adjectival use of "sep 11" specifies the subject matter, designating a particular branch or application of astrological study focused on the events of September 11, 2001.
This field of analysis involves the creation and interpretation of astrological charts for the specific times and locations of the September 11th attacks. Practitioners examine the positions and aspects of celestial bodiessuch as the opposition between Saturn (representing structure, authority) and Pluto (representing destruction, transformation)at the moment of the events. A primary technique is to analyze these "event charts" in relation to the natal chart of the United States (commonly the Sibly chart of July 4, 1776) to identify significant transits and planetary interactions believed to correspond with the national crisis.
The primary objective of this astrological practice is not predictive in a scientific sense but rather interpretive. It seeks to provide an archetypal or symbolic framework for understanding the nature, timing, and impact of the events within the system of mundane astrology, which is the branch concerned with world events, nations, and politics. This analysis offers a metaphysical perspective on the historical and collective significance of the tragedy, operating entirely within the belief system of astrology.