In astrology, a T-Square is an aspect pattern created when two planets or other chart factors form an opposition while each also forms an approximate 90-degree square to a third planet or point. The result is a triangular configuration that concentrates tension and activity within a particular part of the chart. Astrologers often give special attention to the planet at the apex of the pattern because it receives square aspects from both ends of the opposition and may become a focal point for the configuration. The meaning of a T-Square depends on the planets, signs, houses, modalities, and broader chart context involved and should not be interpreted as inherently negative.