In astrology

Astrology

Astrology consists of a number of belief systems which hold that there is a relationship between astronomical phenomena and events in the human world...

, a semi-square is an astrological aspect

Astrological aspect

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. Aspects are measured by the angular distance in degrees and minutes of ecliptic longitude between two...

 that two planet

Planet

A planet is a celestial body orbiting a star or stellar remnant that is massive enough to be rounded by its own gravity, is not massive enough to cause thermonuclear fusion, and has cleared its neighbouring region of planetesimals.The term planet is ancient, with ties to history, science,...

s make when they are 45° apart from each other. The semi-square is considered to be the 8th harmonic

Harmonic

A harmonic of a wave is a component frequency of the signal that is an integer multiple of the fundamental frequency, i.e. if the fundamental frequency is f, the harmonics have frequencies 2f, 3f, 4f, . . . etc. The harmonics have the property that they are all periodic at the fundamental...

 of the chart because it is one-eighth of the 360° circle that the zodiac

Zodiac

In astronomy, the zodiac is a circle of twelve 30° divisions of celestial longitude which are centred upon the ecliptic: the apparent path of the Sun across the celestial sphere over the course of the year...

 resides in (i.e., 360 / 8 = 45). The semi-square is considered to be a minor hard aspect

Hard aspect

In astrology, a hard aspect is an astrological aspect that stimulates the native to take some action to resolve tension, conflict, or stress in his life. Because they required the native to take action, they are very motivational in nature. All hard aspects are considered to be disharmonious on...

 because it is thought to cause friction in the native's life and prompt them to take some action to reduce that friction.

For example, if the Sun

Sun

The Sun is the star at the center of the Solar System. It is almost perfectly spherical and consists of hot plasma interwoven with magnetic fields...

 is posit

Posit

Posit is something that is posited; a postulate; an axiom. It may also refer to:POSIT, as an acronym, may stand for:* Process Optimization, Standardization and Innovation Technique, a standard to measure global business processes...

ed in 10° Aquarius

Aquarius (constellation)

Aquarius is a constellation of the zodiac, situated between Capricornus and Pisces. Its name is Latin for "water-bearer" or "cup-bearer", and its symbol is , a representation of water....

 and Venus

Venus

Venus is the second planet from the Sun, orbiting it every 224.7 Earth days. The planet is named after Venus, the Roman goddess of love and beauty. After the Moon, it is the brightest natural object in the night sky, reaching an apparent magnitude of −4.6, bright enough to cast shadows...

 is posited in 25° Pisces then a semi-square would occur. This is thought to indicate that the native is not likely to be totally happy in matters of love

Love

Love is an emotion of strong affection and personal attachment. In philosophical context, love is a virtue representing all of human kindness, compassion, and affection. Love is central to many religions, as in the Christian phrase, "God is love" or Agape in the Canonical gospels...

. The native is thought to have a tendency to seek out those individuals who are not necessarily compatible to them, and this may lead to a sense of tension and actions to correct what to them may be frustration.