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Astrological theories assume a link between an individual's personality traits and the positions of the sun, moon, and planets in the zodiac at the moment of birth. Previous research has examined the relation of the sun sign to personality traits, but moon and ascendant signs have not been studied in relation to personality traits. The dominance effect of the sun on men and the moon on women has also not been empirically researched. Eysenck Personality Inventory (EPI) scores on extroversion and emotionality were obtained from 190 first-year university students. Date, time, and location of birth were requested, to establish the positions of the sun, moon, and ascendant in positive, negative, and water signs for each individual. Multiple t tests showed a significantly greater mean extroversion score for the group with both the sun and the moon in positive signs than for the group with both in negative signs. No other differences in means were significant. The findings generally did not support theo...