Traditionally, Mars and Saturn are considered the malefic planets, with Mars being the lesser malefic and Saturn the greater. They are opposed to the benefic planets such as Jupiter and Venus, which are said to grant good fortune by contrast. In Modern Astrology Uranus, Neptune, and Pluto are sometimes also considered malefic, especially when in difficult aspect to a personal planet, however, they are still under consideration.
A planet that is placed between two malefic planets, traditionally Mars and Saturn, is said to be "besieged." Besieged planets are believed to be very restricted in their functioning, so even if a planet is a benefic, the fact that it is besieged means the beneficial attributes it would normally emanate will be lessened whilst in that configuration.
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