Antiscions

greek: ἀντίσκια (antiskia, plural) · latin: antiscia

Definition

Antiscions are the plural collection of mirror-image points (Greek antiskia, 'opposite shadows') generated by reflecting planetary longitudes across the solstitial axis. The full sign-by-sign pairing in the standard modern convention is Gemini-Cancer, Taurus-Leo, Aries-Virgo, Pisces-Libra, Aquarius-Scorpio, and Capricorn-Sagittarius — each pair sharing equal declination on either side of the solstice. Holden's framing: 'These are the signs that were antiscia or antiscions of each other, since their distances from the solstitial line were the same.'

In Tradition

Across Hellenistic and traditional Western practice antiscions are read as a sympathetic-aspect family carried by equal solar declination rather than zodiacal longitude distance. A planet's antiscia points are treated as a second layer of contact alongside its standard aspects — operating, in Lilly's phrasing, 'as though the planet were physically at that degree.' The doctrine survives as the precursor of the modern parallel of declination.

In Practice

You compute the antiscions of all chart factors by reflecting each longitude across 0° Cancer / 0° Capricorn, then check which natal or transiting points fall within about 1° of those reflections. Tight antiscion-and-contrantiscion contacts are read as hidden conjunctions and oppositions that frequently illuminate horary outcomes the visible aspects do not explain. In modern declination-aware practice the antiscions doctrine is largely subsumed into parallel and contraparallel readings, but traditional horary still uses the longitude-based form directly.

Historical Origin

The antiscions doctrine is attested in Firmicus Maternus, who credits Ptolemy. Holden traces the historical shift in the solstitial axis from Eudoxan mid-sign solstices to Ptolemaic sign-beginning solstices, with the corresponding shift in which sign pairs are antiscia of each other. Lilly preserves the doctrine in *Christian Astrology* Volume 1; the parallel-of-declination equivalence is documented in modern scholarship.

Further Reading