Antiscia

greek: Ἀντισκία (Antiskia)

Definition

Antiscia (Greek antiskia, Ἀντισκία, "opposite shadow") are mirror-points: take any degree of the zodiac and reflect it across the solstice axis — the line through 0° Cancer and 0° Capricorn — and you land on its antiscium (the plural is antiscia). The two degrees get equal hours of daylight. So 10° Gemini mirrors to 20° Cancer, and 5° Aries mirrors to 25° Virgo. When a planet sits on another planet's antiscium, the two behave like a hidden conjunction.

In Tradition

Astrologers read antiscia as hidden, symmetrical connections sitting underneath the ordinary pattern of aspects. Brennan, Houlding, and Frawley, following Firmicus Maternus, Hephaistio, and the Arabic-Latin transmission through Bonatti and Lilly, treat them as covert links held to a tight orb — extra threads of connection between planets that do not touch each other by sign or by any of the standard angles.

In Practice

You find a planet's antiscium by reflecting its longitude across the solstice axis: antiscium = 30° Cancer minus the longitude when the planet is below the axis, or 30° Capricorn minus it when above. More simply, the signs pair off — Gemini-Cancer, Taurus-Leo, Aries-Virgo, Pisces-Libra, Aquarius-Scorpio, Capricorn-Sagittarius — and within the sign you flip the degree to 30 minus the original. Traditional practice holds a tight orb of just 1-2 degrees: antiscia are exact mirror-points, not loose sympathies, and fade fast outside it. When planet A sits on planet B's antiscium, the two act as if joined — a Mars on Venus's antiscium works like a covert Mars-Venus conjunction even when they share no sign. The contra-antiscium, the opposite degree, gives a covert opposition. In horary work — a chart cast for the moment a question is asked — antiscia reveal hidden allies, secret enemies, and quiet relationships the surface aspects never show.

Historical Origin

The antiscia doctrine appears in Firmicus Maternus' Mathesis II.29 (4th c. CE Latin), in Hephaistio of Thebes' Apotelesmatics, and in the Arabic-Latin transmission through Bonatti's Liber Astronomiae (13th c.). Lilly's Christian Astrology (1647) carries the technique into English horary practice as standard medieval-Latin doctrine. It returned to modern use through traditional revival authors, including Frawley's Horary Textbook and Houlding.

Etymology

Origin: Greek. Meaning: Opposite shadow, mirror shadow.

Further Reading

  • Firmicus Maternus, Mathesis II.29
  • William Lilly, Christian Astrology
  • John Frawley, The Horary Textbook