Hellenistic
The astrology of the Greek-speaking Mediterranean from roughly the 1st century BCE to the 7th century CE, as recorded by authors such as Vettius Valens, Dorotheus and Ptolemy.
1 Oct 2026
Libra is a masculine, cardinal air sign, and the tradition lists no domicile, exaltation, detriment or fall for the Moon there. Domicile is the sign a planet rules, its home. Libra is the Sun's fall and Saturn's exaltation, so the sign is crowded with strong and weak conditions for other planets and neutral for the Moon. Hellenistic astrologers read the Moon's condition through Venus, the domicile lord, and Venus is a benefic belonging to the night team, the same team as the Moon. Sect is the tradition's way of sorting the planets into a day team and a night team. The Moon, a feminine planet in a masculine sign, is a partial match in gender. Look next to Venus's sign, house and dignity. Venus is exalted in Pisces and in domicile in Taurus and Libra, so those are the placements the tradition treats as strongest for the lord.
A note on “detriment”: the early Hellenistic texts note a planet opposite its own sign without naming it. The term is defined only in late and medieval sources, and scholars disagree on whether the idea was implicit earlier.
Sources
- Ptolemy, Tetrabiblos, Book I
- Vettius Valens, Anthology, Book I
- Chris Brennan, Hellenistic Astrology: The Study of Fate and Fortune (2017)
What was checked
An AI research review checked this text against sources on 1 Oct 2026. No person has reviewed it.
Reviewer's notes
Checked sign element, modality and gender, domicile, exaltation, detriment and fall against the project data and Ptolemy, plus sect and sign relationships; all consistent. gender/sect match claims rest on Ptolemy and a secondary source. Detriment is stated as a table fact where it appears; its Hellenistic status is disputed (secondary source only). Source works confirmed to exist and to treat the topic (Valens Book I opened; others via secondary pages).
Sources consulted
- Loeb text of Ptolemy, Tetrabiblos I: planet genders (I.6), diurnal/nocturnal planets and Mercury as morning/evening star (I.7), masculine/feminine and bicorporeal signs (I.11–12), houses of Sun, Moon and Saturn (I.17), exaltations and depressions (I.19); Ptolemy does not rank domicile above exaltation penelope.uchicago.edu (opens in a new tab)
- Riley's translation, Valens Anthology Book I: day/night sect of each planet, and the natures of the signs (house of, masculine/feminine, bicorporeal) skyscript.co.uk (opens in a new tab)
- table of dignities; Hellenistic authors treated domicile, exaltation, triplicity and bounds as comparably influential, ranking and point scores came later (secondary source) en.wikipedia.org (opens in a new tab)
- masculine signs are diurnal and feminine nocturnal; ancient authors (Dorotheus, Serapio) say planets do better in signs of their own gender or sect; secondary source sevenstarsastrology.com (opens in a new tab)
- Anthology, ten books, c. 150–175 CE, Riley translation online en.wikipedia.org (opens in a new tab)
- Brennan, Hellenistic Astrology: The Study of Fate and Fortune, February 2017, survey of the tradition's techniques goodreads.com (opens in a new tab)