T:

Terra: a primeval Roman goddess equivalent to the Greek Gaia, also called Tellus or Tellus Mater, and thus the Latin name for our planet. “Mater” means mother in Latin, so “Tellus Mater” is mother earth.

Terrestrial: an inhabitant of Terra, thus, an earthling in the interplanetary scheme of things.

Theogony: a 1022-line narrative epic poem (meaning generations or genealogy of the gods) written about 700 B.C. by Hesiod. It describes the origins and genealogy of the ancient Greek gods and synthesizes the many existing myths and local traditions (see pages 72-74, 117 and 178).

tidal locking: occurs when one side of an orbiting body always faces another. True of our Moon and most known moons in the Solar System, it occurs because the gravity of the parent causes a tidal bulge in the smaller body stabilizing towards the parent and locking in that orientation. Pluto and Charon are both tidally locked to each other.

Titans: Gaia, Uranus, and their children Kronos, Rhea, Oceanus, Tethys, Hyperion, Mnemosyne, Themis, Iapetus, Coeus, Crius, Phoebe, Thea, Prometheus, Epimetheus, Atlas and Metis (see the Greek gods’ genealogy tree on page 73). The Golden age of Man took place during the rule of Kronos and the Titans. The elder race or second generation of gods, the Titans refused to give up power to the next generation of gods. A ten-year war ensued between the Titans and the Olympians led by Zeus, resulting in the Titans being exiled to Tartarus, a stormy pit beneath the Earth. At the end of the Age of Heroes Zeus released the Titans, making Kronos king of the Elysian Isles to rule over the shades of the Heroes.

TNO: an initialism for Trans-Neptunian Object.

trans-Neptunian object (TNO): the name given to any solar system object that orbits the sun, on the average, at a greater distance than Neptune. The volume of space populated by TNOs can be further subdivided into the Kuiper belt, the Oort cloud, and the scattered disk. Eris, Pluto, its largest moon Charon, Makemake, Haumea, Sedna, Orcus, Quaoar, and Varuna are the nine largest TNOs—but there are trillions of them.

translation of light: if planet A aspects planet B and planet B aspects planet C, then A may aspect C even if the orb between A and C is otherwise too wide. This is because their mutual aspect to planet B strengthens the aspect between A and C. This is particularly noticeable in harmonic syndromes of more than 3 planets like a grand cross or sextile.

transit(ing): a moving planet at some time after birth, usually significant insofar as it aspects some planetary birth position; also, the crossing of the local meridian by a celestial body.

trine:  the 120° aspect; one third of the circle, denoting harmony, ease, gifts, stability and creativity; orb 6°-8°. Planets in trine are usually (but not necessarily) in the same element. For example, the Moon at 28° Cancer is trine (with a 4° orb) to the Sun at 2° Sagittarius, but they are not in the same element. Not conducive to change like the square; and, because of the inertia of the trine, the principal “use it or lose it” becomes relevant.

triplicity (see elements and page 52): any one of four groups of three signs apiece with the characteristic that all planets in any one triplicity relate harmoniously (are in trine or sextile) to each other. The ancient name for these four groups as a whole is elements, and the names of the elements are earth (Taurus, Virgo and Capricorn), air (Gemini, Libra and Aquarius), fire (Aries, Leo and Sagittarius), and water (Cancer, Scorpio and Pisces). Two or more planets in the same element usually relate harmoniously to each other, although what it means for planets to be “in aspect” must be understood and taken into account (see page 53).

trojan: an asteroid or moon that shares its orbit with a larger planet or moon without colliding because it inhabits (or orbits about) one of the planet’s two stable Lagrangian points L4 or L5.

Trojan asteroid: asteroids that orbit stably about Jupiter’s Lagrangian points. The Trojan asteroids are colored green in the diagram on page 145.

tropical: referring to the northerly or southerly turning of the Sun twice a year at the solstices. This marks the seasonal cycle of light and dark on the Earth bringing about the 12 signs. Tropical and sidereal astrologers differ in that the former believe the signs to be 12 equal divisions of the interval between successive vernal equinoxes, and that these 12 stages in the Earth’s light and dark cycle, not the constellations from which they derived their names, are interpretively significant. Sidereal astrologers believe that it is the more fixed, non-precessing constellations that are interpretively significant.

T-square: an opposition with a third planet square to both ends. Although similar in energy to the grand cross, this structure is said to lack its balance, and therefore to focus one’s attention on the “missing leg.” A heavy transiting planet filling in the open end often initiates a crisis.