A tool that identifies stelliums within an astrological chart is designed to calculate instances where three or more planets are clustered within the same zodiac sign or house. For example, an individual with their Sun, Mercury, and Venus all located in the sign of Leo would, according to most definitions, possess a Leo stellium.
The presence of planetary groupings is deemed significant in astrological interpretation because it concentrates energy within a specific area of life or a particular expression of character. Historically, astrologers have viewed these groupings as indicators of intensified themes and potential areas of focus or challenge for the individual.
