Western astrologer calculates precise aspects between different planets in the natal chart to decide about the natal promises in a person’s chart. For timing of events in a person’s life, the western astrologer depends on the aspects formed between transiting planets with the natal positions of different planets. As players in the human drama, we respond in some way to all the circumstances we experience in life. The dynamics that define and direct the energy of the circumstances we encounter in life are the planetary aspects; that is, the geometrical angles formed by transiting planets to our natal planets..
The Opposition: The opposition occurs when two planets are 180 degrees apart from each other. Opposition of planets are generally considered to be very challenging or difficult in a person’s life.
The Trine: The trine occurs when two planets are 120 degrees apart from each other. The trine aspect is considered as a very favorable combination. Dynamics of trine is considered to be the most fortunate of aspects it allows the positive energies between the planets to flow uninterrupted without any hindrance.
The Square: The square occurs when two planets are located 90 degrees apart. The square aspect is supposed to be challenging and it signifies major frustrations and obstacles that demand immediate attention.
The Sextile: The sextile is formed when two planets are located 60 degrees apart. This is also a favorable aspect. Unlike trine, a sextile usually represents an opportunity that will eventually lead to a success. These are the primary aspects that western astrologers will definitely analyze for his interpretation.
However, there are other aspects also which some western astrologers consider equally important for the interpretation of the transit. They are as follows :