Major Planetary Aspects


The Major Planetary Aspects represent the most important component in the Donald Bradley Siderograph.  Planetary aspects represent the number of degrees between two planets.  These aspects can be positive or negative.


Positive Aspects
See below for an example of positive aspects (e.g., planets 60 degrees and 120 degrees away from each other) from the perspective of Earth (i.e., geocentric).  A large number of positive aspects between planets is associated with an upturn in the stock market.  Note that a planetary aspect of 120 degrees (i.e., trine) is typically considered to be equivalent to an aspect of 240 degrees (i.e., 360 degrees minus 120 degrees).

Positive Planetary Aspects (60 and 120 Degrees)



Negative Aspects
See below for an example of negative aspects (e.g., planets 90 degrees and 180 degrees away from each other) from the perspective of Earth (i.e., geocentric).  A large number of negative aspects between planets can be associated with weakness in the stock market.

Negative planetary aspects between planets



Planetary conjunctions take place when the angle between two planets is zero degrees.  Donald Bradley classified some planetary conjunctions as positive and others as negative.  The table below illustrates which of these planetary conjunctions are positive and which are negative.  For example, Donald Bradley identified a conjunction of Mercury with Venus as positive and a conjunction of Mars with Jupiter as negative.

Conjunctions between planets


The table below shows the “Valency of Conjunction” for each planetary aspect.  Pluses in green indicate that a conjunction between two planets is positive, and a red minus sign indicates that a conjunction between two planets is negative.

Valency of conjunctions between planets


Assessing Positives and Negatives

Overall the Bradley Siderograph sees it as a positive for the stock market if there are many positive planetary aspects.  Conversely, the Bradley Siderograph associates an increasing number of negative aspects with a downturn in the stock market.  However, the tool is typically used to identify turning points in the stock market over the medium- to long-term (i.e., rather than short term daily fluctuations).


Geocentric and Heliocentric Aspects

The Bradley Siderograph is based on Geocentric planetary aspects where the angular measurements are viewed from earth.  The alternative would be to use Heliocentric aspects that are calculated from the perspective of the Sun.  Why did Donald Bradley choose to use Geocentric aspects?  In his book, Stock Market Prediction, he provided the following rationale:

  • “It must be remembered that the aspects used in standard astrology are purely angular measures as viewed from the earth, for which reason we speak of them being ‘geocentric’ or ‘apparent’ configurations.  While hypothetical, the modern astrologer prefers to think of this circumstance as an electro-physical phenomenon.  The earth is thought of as possessing a radial field whose geometric axial structure is constantly undergoing disturbances by the interference of lines of force stemming from similar electromagnetic fields of other planets.  The orientation of our terrestrial field is determined by the earth’s orbit.”

Therefore, given that we are more concerned about disturbances caused with the Earth’s radial field rather than that of the Sun, Donald Bradley elected to use a Geocentric perspective rather than a Heliocentric perspective.

Financial Astrology - Planetary Aspects - Solar System

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