Astrology Dictionary - T

Astrology Dictionary - T


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Age of Aquarius • Air • Angles • Applying • Aquarius • Archetype • Aries • Arrowhead • Ascendant • Aspect • Aspect Configuration

Birth Chart • Boomerang

Cancer • Capricorn • Cardinal • Cazimi • Celestial Equator • Centaurs • Chart • Chiron • Collection of Light • Collective • Collective Unconscious • Combust • Conjunction, Conjuct, Conjoin • Contra-Parallel • Cradle configuration • Cusp

Declination • Descendant • Direct • Dispositor • Dissociate Aspect

Earth (element) • Earth (planet) • Eclipse • Eclipse times • Ecliptic • Element • Equinox

Final Dispositor • Fire • Fixed • Full Moon

Gemini • God's Fist • Grand Cross • Grand Sextile • Grand Square • Grand Trine

Hard Wedge • Houses • Houses (meanings)

IC, Imum Coeli • Inconjunct • Intercepted Planet • Intercepted Sign


Kite • Grand Trine Kite • Yod Kite

Leo • Libra • Lights, Luminaries • Lunar Eclipse • Lunar Nodes

Major Aspects • Mars • MC, Medium Coeli • Mean Lunar Node • Mercury • Mercury Retrograde • Midheaven • Modalities • Moon • Moon's Nodes • Multiple Conjunction • Mutable • Mutual Reception • Mystic Rectangle

Nadir • Natal Chart • Neptune • New Moon • North Node

Octile • Opposition • Orb • Out of Bounds • Out of Sign Aspect

Parallel • Part of Fortune, Pars Fortuna • Pisces • Planet • Pluto • Points • Precessed Solar Return • Precession of the Equinoxes • Progressions • Ptolemaic Aspects

Quadriform • Quincunx

Retrograde • Rising Sign • Rolling Conjunction • Rosetta • Ruler • Rulerships

Sabian Symbols • Sagittarius • Saturn • Scorpio • Semi-Sextile • Semi-Square • Separating • Sesqui-Quadrate • Sesqui-Square • Sextile • Shadow (planetary) • Shadow (psychological)
• Sidereal Zodiac • Sign • Solar Eclipse • Solar Return • Solstice • South Node • Square • Station(ary) • Stellium • Sun

Taurus • Thor's Hammer • Traditional Rulerships • Transits • Transpersonal Planets • Trapeze • Trine • Tri-Octile • Tropical Zodiac • True Lunar Node • True vs Mean Nodes • T-Square, T-Cross


Venus • Virgo

Water • Waxing, Waning • Wedge


Zenith • Zodiac



Traits for the sign of Taurus are: methodical, careful, down-to-earth, dependable, pragmatic, stubborn, possessive, tangible, persistent. Planetary ruler: Venus. Associated with 2nd House. Fixed Earth. Top of Page Taurus symbol

Taurus Symbol


Another term for the T-Square aspect configuration. Top of Page  

Thor's Hammer

Another name for the Quadriform aspect configuration.  

Traditional Rulerships

Each sign is assigned a planetary ruler. In modern Western astrology, the transpersonal planets are most often used as sign rulers. Uranus, Neptune and Pluto are considered the planetary rulers of Aquarius, Pisces and Scorpio, respectively.

However, before these outer planets were discovered, Aquarius was ruled by Saturn, Pisces was ruled by Jupiter and Scorpio was ruled by Mars. These planets are seen as the traditional rulers of those signs, whereas using Uranus, Neptune and Pluto are regarded as modern rulerships.

Some astrologers continue to use only the modern rulers, and in fact, most books and website on modern astrology do this. Since the retranslation of ancient astrology texts began in the 1990s, there has been a resurgence of interest in classical astrology techniques and methods. As a result, some astrologers today use only the traditional rulers.

Other astrologers use a combination of both (including me), seeing value in both approaches.

See also: Rulers, Rulerships


Transits refer to where the planets are now in the sky in "real time" (as opposed to planets in your natal chart). The term Transits also refers to a predictive technique used by astrologers, in which the transiting planet positions are compared to where they were when you were born. When transiting planets form geometric aspects to your natal planets, or move through a house in the natal chart, this activates those natal energies in your life. Whether the effects are minor and day-to-day, or major and life-changing, usually depends on the speed of the transiting planet.

Major effect: Uranus, Neptune and Pluto transits usually leave your life very different from how they found it, taking you through deep transformation and major change. The effects tend to reach you at a "soul" level. The effects of each transit last about a year, sometimes two.

Medium effect: Jupiter, Saturn and Chiron transits are also significant and can be life-changing, but tend to affect you on a social or societal level, rather than a "soul" level. The effects of the transit can last roughly from one to nine months.

Minor effect: The Sun, Moon, Mercury, Venus and Mars all move so fast that their effects typically last only a few days at most. They tend to affect us on a day-to-day basis at a more ego-based level. The exception to this is when Mercury, Venus or Mars go retrograde, which brings a longer-term process of growth lasting a few weeks to a few months. Transits from these fast-moving planets can sometimes trigger events and turning points in the longer process of growth brought by the slow-moving planets. Top of Page


Trans-Personal Planets

This is a term often used to describe the slow-moving planets whose orbits lie beyond the orbit of Saturn. (Saturn is the outermost planet seen with the naked eye and known by the ancients prior to the discovery of Uranus in 1781.)

Uranus, Neptune and Pluto are Transpersonal Planets because they embody energies that are more on a "soul" level, rather than an ego level.

Chiron is considered by some astrologers to be a transpersonal planet as well. However, Chiron is also seen by some as a kind of "bridge" between the personal and trans-personal planets.

The sign that a transpersonal planet is in tends to be the same for everyone born in the same generation or sub-generation. For example, the "Baby Boomers" (born between 1938 and 1957) typically have Pluto in Leo. Top of Page

Symbols of the Transpersonal Planets: Uranus, Neptune and Pluto (the first Pluto symbol is most often used in North America).


Another name for the Rosetta aspect configuration. Trapeze is the term used by Bruno and Louise Huber in their book, Aspect Patterns Astrology.  


An aspect between two planets, which are 120 degrees apart (give or take a few degrees; see Orb). Planets in Trine are usually four signs apart. An easy-flowing energy often indicating natural talent and ability.

Energy flows easily between planets in Trine aspect. This is usually interpreted as a positive influence, since their energies combine, cooperate and work together easily. However, sometimes it can also bring too much of a good thing. There is no such thing as an "all good" or "all bad" aspect or planet. Trines can be easy to take for granted, so they can also signify latent talents and untapped natural abilities. Top of Page

Trine aspect - 120 degrees

Trine Aspect Symbol





An aspect between two planets, which are 135 degrees apart (give or take a few degrees; see Orb). In the same family of aspects as the Octile (or Semi-Square). This aspect is derived by dividing the circle into 8 equal segments. The Tri-Octile is three eighths of the circle. Geometrically, a Tri-Octile aspect is one-and-a-half Square aspects (which are 90 degrees) or three Octiles (which are 45 degrees).

Similar to the Square, the Tri-Octile represents a stressful yet dynamic relationship between the aspected planets. When used constructively, there is motivation and purpose for moving forward, and/or integrating past experience that has matured. When the energy becomes stuck or uncontrolled, there can be an obsessive, overbearing or domineering edge to it.

In transits, this aspect can indicate a turning point in the development of a situation. There are choices and decisions to be made. Have you made all the necessary preparations to be ready to manifest what you've been developing? What still needs to be done? Or, now that you have reached the mountaintop, which direction will you take yourself? Now that you have reached the point of no return, how can you assimilate and integrate the results into your life?

Compare: Octile, Square. Top of Page

Tri-Octile, Sesqui-Quadrate, Sesqui-Square aspect - 135 degrees

Tri-Octile or Sesqui-Quadrate or Sesqui-Square aspect symbol

Tropical Zodiac

The 12 zodiac signs, measured by Earth's seasons. The sign of Aries begins at the Sun's position at the Vernal Equinox (in April). Cancer begins at the Sun's position at the Solstice (June: summer for northern hemisphere, winter for southern hemisphere). Libra begins at the Sun's position at the Autumnal Equinox (September). Capricorn begins at the Sun's position at the other Solstice (December: winter for northern and summer for southern hemispheres). See also: Sidereal Zodiac, Precession of the Equinoxes, Age of Aquarius. Top of Page  

True Lunar Node

The Lunar Nodes are the two places where the orbit of the Moon around the Earth intersects with the (apparent) path of the Sun around the Earth (from our perspective on Earth). The positions of these nodes are always opposite and move in an overall retrograde direction.

However, the precise position of the nodes actually fluctuate slightly due to a wobble in the gravitational centre between the Earth and Moon. As a result, the True Nodes vacillate back and forth a bit. Although usually retrograde, the True Nodes turn in a direct motion briefly, lasting hours to days, and then return to their normal retrograde motion.

See True versus Mean Lunar Nodes for more about the differences.

True versus Mean Lunar Nodes

The Lunar Nodes are the intersection points between the Moon's orbit around the Earth and the (apparent) path of the Sun around the Earth (the Ecliptic). (See Lunar Nodes in our dictionary section for more details.)

However, there are two ways to calculate the positions of the Nodes – as the True Node or the Mean Node. Both Nodes move in a retrograde direction overall, and they go full circle around the zodiac over a period of about 19 years.

The zodiacal position of the Mean Nodes goes at a steady pace and its direction is retrograde 100% of the time. It is calculated as an average position.

The True Node, on the other hand, wobbles somewhat to slight variations in the distance between the Moon and the Earth. Their shared centre of gravity fluctuates a bit and so the True Node's zodiacal position does a little dance of one-step-forward-two-steps-back. The True Nodes are retrograde most of the time, but they hiccup occasionally where they will go direct for a period of hours to days and then back to retrograde again.

The difference between the two nodal positions is less than 2 degrees at the most, so we're not usually talking about a major difference. However, if you're looking for the precise moment of a slow moving transit to the nodes, for example, it could make a difference whether you use the Mean or True Nodes.

Which one is better? It's largely a personal choice for each astrologer. Here in the Evolving Door Astrology website, the True Lunar Nodes are always used unless otherwise stated. Why? I figure why use an approximation when you can use the precise position of something? Blame it on my Virgo Moon. ;-)

See also: Lunar Nodes, North Node, South Node. For more detailed information, also check out astrologer Steven Forrest's excellent article about the subject.




Aspect configuration. Two planets in Opposition and a third planet mid-way between them forming a Square to both sides. Looks like a "right angle triangle." A stressful but motivating energy. There is a lot of tension in the T-square, but also very dynamic energy. It often represents issues, behaviour and obstacles that need to be problem-solved. This can generate enormous creative friction that gives energy, drive and motivation to goals and ambitions in the person's life. In Huber astrology this is called an Achievement Triangle. See Bruno and Louise Huber's book Aspect Pattern Astrology for excellent information about aspect patterns. Pronounced: TEE-square. Top of Page T-Square aspect configuration

T-Square Aspect Configuration

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