In astrology, an aspect is an angle the planets make to each other in the horoscope, and also to the ascendant, midheaven, descendant, lower midheaven, and other points of astrological interest.
A horoscope is an astrological chart or diagram representing the positions of the Sun, Moon, planets, astrological aspects, and sensitive angles at the time of an event, such as the moment of a person's birth.
Astrology is the study of the movements and relative positions of celestial objects as a means for divining information about human affairs and terrestrial events.
In planar geometry, an angle is the figure formed by two rays, called the sides of the angle, sharing a common endpoint, called the vertex of the angle.
Aspects are measured by the angular distance in degrees and minutes of ecliptic longitude between two points, as viewed from Earth.
According to astrological tradition, they indicate the timing of transitions and developmental changes in the lives of people and affairs relative to the Earth.
As an example, if an astrologer creates a horoscope that shows the apparent positions of the celestial bodies at the time of a person's birth, and the angular distance between Mars and Venus is 92° of arc, the chart is said to have the aspect "Venus square Mars" with an orb of 2°.
Mars is the fourth planet from the Sun and the second-smallest planet in the Solar System, after Mercury.
In astrology, the orb is how much an angle made by two points differs from the exactness of an aspect.
Venus is the second planet from the Sun, orbiting it every 224.7 Earth days.
The more exact that an aspect is, the stronger or more dominant it is said to be in shaping character or manifesting change.