Marcus Manilius, Astronomica, G. P. Goold edition
Definition
Marcus Manilius, Astronomica, G. P. Goold edition is an astrological source represented here through cited material on ascendant, aspects, athla, constellations, and day night.
What this work covers
The cited material covers ascendant, aspects, athla, constellations, and day night.
Manilius warns that merely counting signs does not preserve a trine or square across all degrees; the operative geometry is the exact 120-degree or 90-degree division of the circle from degree to degree.
Manilius locates Fortune by projecting the Sun-to-Moon arc from the Ascendant by day and reversing to the Moon-to-Sun arc by night; the remaining athla follow Fortune in a fixed zodiacal order.
Manilius rejects the assumption that every sign rises in two equal hours: rising times vary with seasonal day length and location, with equal day and night serving as the reference condition.
Scope and limitations
This overview is limited to the cited portions. It does not stand in for the complete work, reproduce source passages, or make every documented technique a universal chart interpretation.