The Cosmic or Grand Cross happens when two planets are in opposition and two other planets in opposition cross them at 90 degree angles. Represents the personality or ego. Used with the Circle to signify the spiritual and physical nature. Less than favorable position of a planet in a sign. The opposite of a planets 'Dignity'.
Planetary traits operate better in certain signs than in others.
It is measured in degrees of arc north and south of the equator. The planet Mars. One degree out of the thirty in a sign, or of 360 in the circle. Can refer to the exact degree rising at the time of birth. The Rising Sign or Ascendant.