✦ Astrology Glossary
Stellium
A stellium occurs when three or more planets cluster in the same zodiac sign or house, intensifying that area of life.
A stellium is a concentration of three or more planets within the same zodiac sign or house in a natal chart. This grouping amplifies the energy of that sign and house, making its themes a dominant focus in the person's life. Stelliums are rare and often indicate a strong, specialized personality or life path.
How it works
In a natal chart, a stellium is identified when at least three planets (including the Sun, Moon, Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune, or Pluto) occupy the same sign or house. The closer the planets are in degree, the more intense the effect. For example, three planets in Aries in the 10th house can suggest a driven, ambitious person who leads in their career. The sign gives the flavor, and the house shows the life area. Outer planets (Uranus, Neptune, Pluto) can be part of a stellium but often have a generational influence.
In practice
When interpreting a stellium, note the sign and house first. The stellium's ruler (the planet ruling that sign) is especially important. Also consider aspects between stellium planets — they can create internal tension or harmony. A stellium can indicate a talent or challenge that the person must integrate. It often shows where life feels "full" or where the person has many experiences. For example, a 7th house stellium might bring many relationships or a strong focus on partnerships.
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Grand Cross
A Grand Cross is a rare aspect pattern where four planets form two oppositions and four squares, creating intense tension and a call for action.
Grand Trine
A harmonious aspect pattern where three planets form a triangle of 120° aspects, creating ease and natural talent.
Kite
A rare aspect pattern formed by a grand trine plus one planet opposite the apex, creating a focused release point.
Mystic Rectangle
A rare aspect pattern formed by two oppositions and two trines, creating a harmonious flow of energy between four planets.
T-Square
A T-Square is a dynamic aspect pattern formed by two planets in opposition, both square a third planet.
Yod
A Yod is a rare aspect pattern formed by two planets in sextile, both quincunx a third planet, creating a focused point of tension and destiny.