Elemental Compatibility
Elemental Compatibility
Elemental Compatibility
1. Introduction
Elemental compatibility explores how the four classical elements—Fire, Earth, Air, and Water—combine to shape attraction, rapport, conflict, and growth within pairs. In astrology, elements organize the twelve zodiac signs into triplicities and provide a common language for describing temperament, motivation, and relational dynamics. The framework descends from ancient natural philosophy, in which elemental qualities (hot, cold, moist, dry) underpinned both cosmology and medicine, later becoming a core scaffold for astrological interpretation and love compatibility across traditions (Ptolemy, trans. Robbins, 1940; Valens, 2nd c., trans. Riley, 2010).
The significance of elemental dynamics in relationships lies in their broad, immediately observable patterns. Fire and Air pairs often emphasize vitality, inspiration, and exchange; Earth and Water pairs tend toward security, care, and material-emotional reciprocity; mixed pairs negotiate differences that can spark creativity or friction, depending on chart context and timing. While element-based compatibility does not replace full-chart analysis, it supplies a foundational lens to assess temperament fit, shared needs, and interaction styles in synastry and composite technique (Lilly, 1647; Hand, 1975).
Historically, the elements informed “sympathy” and “antipathy” among signs and the classical doctrine of aspects, through which signs of the same element (trines) and complementary qualities (sextiles) were judged congenial, while incongruent qualities (squares) or polarity (opposition) signaled challenge requiring integration (Ptolemy, trans. Robbins, 1940; Bonatti, trans. Dykes, 2007). Hellenistic, medieval, and Renaissance astrologers combined elemental logic with dignities, receptions, and house-based significators when judging marital prospects and affinity (Dorotheus, trans. Pingree, 1976; Abu Ma’shar, trans. Dykes, 2010; Lilly, 1647).
Key concepts previewed here include triplicity rulerships and humoral temperaments; polarity and modality; classical and modern synastry methods; Vedic rashi/nakshatra matching; and Chinese Five Element and yin–yang balancing. Cross-references include Triplicity, Essential Dignities, Reception, Synastry, Composite Chart, Davison Chart, Aspects, Houses, and Fixed Stars. Practically, readers will learn how to contextualize elemental synergy and friction within chart factors like rulership links, major aspects, and house overlays, remembering that examples illustrate principles rather than universal rules (Lilly, 1647; Houlding, 2006). Topic clustering aligns this article with the BERTopic theme “Elemental Compatibility and Triplicity Rulerships,” interlinked to nodes on dignities, aspects, and relationship techniques, supporting graph-based exploration of sign pairs and their planetary rulers.
Sources for classical foundations: Ptolemy’s Tetrabiblos (University of Chicago) and Valens’ Anthology (CSUS, Riley translation) provide the ancient backbone; Lilly’s Christian Astrology (Skyscript) exemplifies Renaissance judgment; modern composite methods are traced to Townley and Hand (Townley, 1973; Hand, 1975).
2. Foundation
Elemental compatibility rests on two classical building blocks: elemental qualities and zodiacal relationships. Fire (hot, dry) is active, assertive, and vital; Earth (cold, dry) is stabilizing and pragmatic; Air (hot, moist) is social and communicative; Water (cold, moist) is receptive and affective. These qualitative pairings stem from ancient natural philosophy and were integrated into the astrological canon for assessing temperament and relational “sympathy” (Ptolemy, trans. Robbins, 1940). In the zodiac, each element contains three signs—its triplicity—and same-element signs are in trine aspect, traditionally judged as supportive. Complementary elements stand in sextile, also considered congenial; elements of clashing quality are often configured by square or opposition, signaling friction that can mature into productive dynamism when supported by dignities and reception (Ptolemy, trans. Robbins, 1940; Bonatti, trans. Dykes, 2007).
Core concepts for relationship analysis include: triplicity rulerships (the planets that steward each element), essential dignities (planetary strength by sign/exaltation), and reception (mutual support via dignities). For instance, considering how significators of partners (e.g., Venus and Mars, or rulers of the 1st and 7th houses) connect by aspect and dignity reveals whether elemental affinity is reinforced structurally (Dorotheus, trans. Pingree, 1976; Lilly, 1647; Houlding, 2006). Elemental logic interacts with Polarity (masculine—Fire/Air; feminine—Earth/Water) and Modality (Cardinal, Fixed, Mutable), shaping how pairs initiate, sustain, or adapt within the relationship (Ptolemy, trans. Robbins, 1940; Lilly, 1647).
Historically, Hellenistic and medieval sources applied elements and aspect doctrine to synastry, often starting from Sun, Moon, and Ascendant relationships, then extending to Venus and Mars as romance indicators. The medieval Arabic tradition refined reception and dignity scoring, while Renaissance astrologers elaborated house-based relational significators and horary tests for marriage (Valens, trans. Riley, 2010; Abu Ma’shar, trans. Dykes, 2010; Lilly, 1647). In Vedic astrology, compatibility is approached via rashi relations and Ashtakoota (Guna Milan), which assesses multiple factors including temperament and lunar mansion compatibility, paralleling the spirit of elemental fit though with its own metrics (Charak, 1998). In Chinese astrology, Five Element (Wu Xing) theory applies analogous elemental balance and yin–yang principles for relationship harmony, offering a parallel model to Western four-element compatibility (Britannica, Wu Xing; Britannica, Chinese Zodiac).
Foundational understanding for practice: elemental assessment is a starting framework, not a verdict. Full-chart analysis—rulerships, aspects, sect, house overlays, dignities, receptions, and timing—modulates whether elemental synergy becomes enduring rapport or fleeting chemistry. Practitioners should explicitly communicate that examples are illustrative and that relationship outcomes depend on the entire configuration and lived context (Lilly, 1647; Houlding, 2006).
3. Core Concepts
Primary meanings:
- Fire (Aries, Leo, Sagittarius): expressive, initiating, will-driven; seeks passion, visibility, and adventure. In pairs, Fire thrives on shared purpose and momentum; too little grounding can dissipate energy (Ptolemy, trans. Robbins, 1940; Valens, trans. Riley, 2010).
- Earth (Taurus, Virgo, Capricorn): stabilizing, pragmatic, craft-focused; seeks reliability, resource stewardship, and tangible results. In pairs, Earth values consistency and shared building; excessive rigidity can stifle spontaneity (Lilly, 1647; Houlding, 2006).
- Air (Gemini, Libra, Aquarius): sociable, idea-centered, connective; seeks dialogue, perspective, and networks. In pairs, Air prizes mental rapport and flexibility; detachment can challenge emotional attunement (Ptolemy, trans. Robbins, 1940; Valens, trans. Riley, 2010).
- Water (Cancer, Scorpio, Pisces): receptive, protective, imaginal; seeks bonding, trust, and depth. In pairs, Water nurtures security and shared feeling; without boundaries, enmeshment can arise (Lilly, 1647).
Key associations in pairs:
- Fire + Air: often a stimulating, mutually enlivening dyad, with Air feeding Fire through ideas and Fire energizing Air into action; timing and structure (e.g., Saturn’s supportive aspects) help translate spark into longevity (Ptolemy, trans. Robbins, 1940; Lilly, 1647).
- Earth + Water: frequently a stabilizing, mutually supportive bond, with Water nourishing Earth’s projects and Earth providing containers for Water’s sensitivity; dignities and positive receptions enhance resilience (Bonatti, trans. Dykes, 2007).
- Fire + Water: can produce “steam”—intense passion with fluctuating temperature. When receptions or supportive trines/sextiles exist elsewhere, the pair channels passion constructively; without them, volatility may dominate (Valens, trans. Riley, 2010).
- Earth + Air: inventive yet negotiating different tempos—Air ideates, Earth implements. Harmonious Saturn-Venus or Mercury-Venus configurations can bridge pace and preference (Lilly, 1647; Houlding, 2006).
Essential characteristics to weigh include polarity (yang Fire/Air vs. yin Earth/Water), modality (Cardinal initiative, Fixed endurance, Mutable adaptability), and rulership links. For example, knowing that Mars rules Aries and Scorpio and is exalted in Capricorn connects elemental expression to dignity frameworks that often influence attraction patterns and conflict styles in pairs (Houlding, 2006). A Mars–Saturn square between charts can manifest as tension and discipline training the relationship’s energy; whether it is constructive depends on receptions, aspects from benefics, and house context (Lilly, 1647).
Cross-references:
- Aspect logic: Trines (same element) and sextiles (complementary elements) signal ease; squares (clashing qualities) and oppositions (polarity) demand integration (Ptolemy, trans. Robbins, 1940).
- Dignities and reception: Partners’ rulers exchanging dignities can mitigate elemental friction (Dorotheus, trans. Pingree, 1976; Bonatti, trans. Dykes, 2007).
- House overlays: A partner’s planets landing in another’s 4th or 7th houses reframe elemental impulses through family and partnership significations (Lilly, 1647).
- Fixed stars: Conjunctions can color pair dynamics; for instance, Mars conjunct Regulus is associated with leadership tone—context and orbs apply (Robson, 1923).
Topic clusters: This subject interlinks with nodes on Essential Dignities, Reception, Aspects, Houses & Systems, and relationship techniques like Synastry, Composite Chart, and Davison Chart, enabling graph-driven study of compatibility patterns and their planetary scaffolding (Lilly, 1647; Hand, 1975).
4. Traditional Approaches
Hellenistic methods introduced element-based “friendship” via aspect doctrine and triplicity. Ptolemy systematized sympathy through configured signs: trines (same element) and sextiles (complementary elements) support union, while squares and oppositions challenge cohesion unless moderated by other factors (Ptolemy, trans. Robbins, 1940). Valens describes how planets configured by benefic aspects bring concord, and by malefic aspects bring contention, emphasizing reception and planetary condition as decisive (Valens, trans. Riley, 2010). Triplicity rulers—day/night lords associated with each element—were used to gauge stability across life topics; in relationships, this informs long-term compatibility when significators tie into robust triplicity support (Dorotheus, trans. Pingree, 1976).
Classical interpretations of marriage and affinity typically began with Sun–Moon relations, zodiacal adjacency, and aspectual ties. Dorotheus advised weighing the condition of significators and their receptions to judge marital happiness and timing, including electional guidance for marriages—implicitly leveraging elemental affinities via sign relationships (Dorotheus, trans. Pingree, 1976). The doctrine of sect (day vs. night charts) further modifies how hot/cold qualities express in a pair, with benefics/malefics changing tenor by sect—an important nuance for elemental heat or coolness within interaction (Valens, trans. Riley, 2010).
Medieval Arabic astrologers expanded these principles. Abu Ma’shar’s Great Introduction details receptions, dignities, and planetary mixtures shaping outcomes in unions; harmonious receptions can “soften” difficult aspects, just as elemental sympathy smooths interactions (Abu Ma’shar, trans. Dykes, 2010). Guido Bonatti articulated rigorous scoring of dignities and detailed synastry via aspect links between significators (e.g., rulers of the Ascendants, Venus–Mars, Moon connections), emphasizing the necessity of support from triplicity rulers and benefic mediation (Bonatti, trans. Dykes, 2007). In medical and temperament doctrine, the four humors map onto elements—choleric (Fire), melancholic (Earth), sanguine (Air), phlegmatic (Water)—giving a psychophysiological layer to compatibility judgments (Ptolemy, trans. Robbins, 1940). While humoral medicine is premodern, the temperament model underpins traditional relationship readings by highlighting energy balance and lifestyle fit.
Renaissance techniques, exemplified by William Lilly’s Christian Astrology, integrated horary questions (“Will we marry?” “How will the match prosper?”) and natal synastry with classical tools. Lilly’s handling of aspects, reception, and house-based significators (1st/7th rulers; Venus as general significator of love; the Moon for flow and timing) shows elemental logic operating through the signs and their planetary lords. Agreements by trine/sextile and strong reception (e.g., significators in each other’s dignities) suggest ease, while squares without reception forewarn struggle; yet even harsh aspects can be mitigated by mutual reception or benefic translation of light (Lilly, 1647). In electional practice, astrologers sought days and hours that dignified Venus and the Moon and connected significators via harmonious aspects, tacitly privileging compatible elemental conditions (Dorotheus, trans. Pingree, 1976; Lilly, 1647).
Traditional techniques also engaged house overlays and angularity. Planets of one chart placed in the other’s angular houses (1st, 4th, 7th, 10th) exert strong influence; dignified planets in the partner’s 7th can enhance commitment potential (Lilly, 1647). Essential dignities offer a structural counterweight to elemental friction: for example, if two charts show elemental clash (e.g., Earth–Air emphasis), robust reception between key significators may supply the “glue” that reconciles rhythms (Bonatti, trans. Dykes, 2007; Houlding, 2006). Fixed stars occasionally enter traditional judgment when tightly conjunct relationship significators; for instance, Regulus is associated with honor and command, potentially coloring relationship style—though classical authors counsel restraint and careful orbs (Robson, 1923).
In sum, the traditional approach treats elemental compatibility as one layer among many: aspects, dignities, receptions, sect, house strength, and electional timing collectively shape outcomes. The more these layers converge toward concord—especially via trines/sextiles, good reception, and benefic support—the more elemental harmony translates into durable relationship quality (Ptolemy, trans. Robbins, 1940; Valens, trans. Riley, 2010; Lilly, 1647).
5. Modern Perspectives
Modern synastry retains elemental logic but reframes it through psychology, development, and systems thinking. Psychological astrologers, influenced by C. G. Jung’s archetypal theory and ideas of projection and individuation, interpret element pairings as complementary functions within a “relationship psyche.” Fire/Air combinations often symbolize creative ideation and future orientation; Earth/Water pairs may denote secure attachment and embodied care. Mixed elements can catalyze growth when partners consciously integrate differences (Jung, 1952/1973; Greene, 1984).
Composite charts (midpoint method) model the relationship as an entity with its own horoscope. John Townley introduced the composite method in the early 1970s; Robert Hand’s Planets in Composite (1975) popularized interpretive foundations, including how elemental balance in the composite Sun, Moon, and angles reflects the couple’s shared temperament (Townley, 1973; Hand, 1975). Davison charts, calculated by time-space midpoints, offer a related modern approach to a relationship “natal” (Hand, 1975). In both, elemental emphasis—e.g., a composite chart heavy in Fire—highlights a shared style that may differ from each partner’s individual temperament, requiring mindful negotiation.
Evolutionary and archetypal astrologers (e.g., Tarnas, Greene) view elemental compatibility through the lens of life purpose and mythic motifs, noting that challenging pairings can be meaningful if they align with growth trajectories and ethical relating (Greene, 1984; Tarnas, 2006). Contemporary counseling practice stresses consent, communication skills, and cultural context, integrating attachment theory and developmental insights with astrological symbolism. For instance, Air–Water tensions in communication can be addressed by explicitly cultivating reflective listening and emotional labeling, turning a perceived mismatch into a learned competency (Greene, 1984).
Empirical research on astrology’s predictive claims is mixed. A frequently cited double‑blind study (Carlson, 1985) reported no support for astrologers’ accuracy under controlled conditions; critics of the study argue methodological limitations, yet the result encourages epistemic humility in claims of deterministic compatibility. Modern practitioners thus emphasize astrology as a symbolic, meaning‑making system rather than a strict causal predictor, guiding reflective inquiry about relational patterns and needs while avoiding fatalism (Carlson, 1985; Hand, 1975).
Integrative approaches combine traditional scaffolding—dignities, reception, aspect doctrine—with modern psychological framing. A practitioner may begin with elemental assessment and classic synastry (e.g., Venus–Mars, Moon–Moon, ruler connections), then translate findings into relational skills: renegotiating boundaries (Water–Fire), pacing projects (Earth–Air), or balancing spontaneity and containment (Fire/Earth). Timing techniques (transits, progressions, returns) are used to locate windows for dialogue or commitment, always underscoring that examples are illustrative and outcomes depend on agency and context (Lilly, 1647; Hand, 1975).
Finally, cross‑traditional awareness enriches modern practice. Vedic Ashtakoota assigns scored compatibilities paralleling elemental ideas of temperament fit, while Chinese Five Element and yin–yang balance model systemic harmony—offering practitioners comparative frameworks that echo but do not duplicate Western elemental compatibility (Charak, 1998; Britannica, Wu Xing; Britannica, Chinese Zodiac).
6. Practical Applications
Real‑world uses begin with a structured, layered reading:
1) Establish baseline temperament from each chart’s elemental distribution, including Sun, Moon, Ascendant, and key personal planets. Note whether Fire/Air or Earth/Water dominates, and identify mixed patterns (Ptolemy, trans. Robbins, 1940; Lilly, 1647).
- Assess synastry: aspects between Venus–Mars, Moon–Moon, Sun–Moon, and rulers of the 1st and 7th houses. Trines/sextiles can indicate ease; squares/oppositions signal integration challenges. Receptions and essential dignities often determine whether hard aspects are constructive (Dorotheus, trans. Pingree, 1976; Houlding, 2006).
3) Evaluate house overlays: a partner’s planets in the other’s 5th (romance), 7th (commitment), or 8th (intimacy/merging) houses, with angular placements amplifying impact (Lilly, 1647).
4) Synthesize elemental fit with rulerships and receptions. For example, Fire + Air chemistry may gain staying power if the pair’s Saturns offer supportive sextiles/trines, while Earth + Water steadiness benefits from Jupiter/Venus testimony (Ptolemy, trans. Robbins, 1940; Bonatti, trans. Dykes, 2007).
- Check timing: transits/progressions to Venus, Mars, the Moon, and the 7th house ruler can mark phases of meeting, commitment, or reevaluation; solar and lunar returns add annual/monthly layers (Hand, 1975; Lilly, 1647).
Implementation methods include journaling elemental experiences, setting communication agreements that honor differing modalities, and crafting “bridges”: e.g., Earth + Air pairs scheduling ideation (Air) followed by concrete tasking (Earth), or Fire + Water pairs balancing passion rituals (Fire) with attunement check‑ins (Water). Electional strategies can support key relationship events by dignifying Venus and the Moon and linking significators via harmonious aspects (Dorotheus, trans. Pingree, 1976; Lilly, 1647).
Case studies (illustrative only, not universal): a Fire + Air couple with multiple trines may report rapid bonding and shared projects, later adding Saturnine structure to maintain continuity; an Earth + Water pair may navigate external stressors effectively but benefit from deliberate novelty to avoid stagnation. These examples demonstrate technique application; they do not prescribe outcomes for all charts (Lilly, 1647; Hand, 1975).
Best practices:
- Avoid over‑reliance on Sun‑sign matching; emphasize full‑chart analysis.
- Weigh dignities and receptions alongside elemental logic.
- Observe ethical guidelines: do not predict deterministically; present potentials and skills.
- Validate lived experience; use astrology as reflective guidance, not verdict.
- Document sources and methods; use contextual links to authoritative texts.
Remember required cross‑references for relational analysis: rulership connections (e.g., “Mars rules Aries and Scorpio, is exalted in Capricorn”), aspect relationships (“Mars square Saturn creates tension and, if well‑received, discipline”), house associations (“Mars in the 10th house affects career and public image”), elemental links, and fixed star notes (e.g., “Mars conjunct Regulus can color leadership tone within the pair”), all interpreted within orbs and context (Houlding, 2006; Lilly, 1647; Robson, 1923).
7. Advanced Techniques
Specialized methods deepen elemental interpretation by quantifying planetary condition and relational geometry.
- Dignities and debilities: Tally essential dignities for relationship significators (e.g., rulers of the 1st and 7th, Venus/Mars, the Moon). A planet dignified in a partner’s relevant house or receiving that partner’s planet can stabilize mismatched elements by reception. Mutual reception, especially by domicile or exaltation, powerfully mitigates hard aspects and elemental friction (Dorotheus, trans. Pingree, 1976; Bonatti, trans. Dykes, 2007; Houlding, 2006).
- Aspect patterns: Evaluate whether synastry or composite charts form configurations—Grand Trines (same element), Kites (trine backbone with sextile support), T‑Squares/Grand Crosses (cardinal/fixed/mutable stress). Elemental Grand Trines often confer ease and cohesion; T‑Squares demand focused integration through the release point (Ptolemy, trans. Robbins, 1940; Hand, 1975).
- House placements: Angular placements of each partner’s Venus/Mars or 7th‑house rulers in the other’s chart carry outsized weight. An Earth–Water pair gains durability when these planets are angular and dignified; Fire–Air pairs with cadent placements may need deliberate scaffolding to translate spark into sustained practice (Lilly, 1647).
- Combust and retrograde: A partner’s significator combust the Sun may mute expression or inwardly intensify themes; retrograde Venus/Mercury can alter pacing and modalities of affection/communication. In synastry, consider whether the other partner’s benefics aspect these conditions to facilitate clarity (Lilly, 1647; Hand, 1975).
- Fixed star conjunctions: Tight conjunctions (within roughly 1°) to relationship significators can add a specific tonal layer; for example, Regulus is associated with prominence/leadership imagery. Apply conservative orbs and corroborate with planetary testimonies; fixed stars are adjuncts, not sole determinants (Robson, 1923).
- Sect and temperament: Day vs. night charts adjust how “hot/cold” qualities express. In night charts, Mars is more constructive; in day charts, Saturn can be more constructive—nuances that affect how Fire/Earth or Air/Water pairs metabolize conflict (Valens, trans. Riley, 2010).
Expert applications include synthesizing synastry, composite, and Davison analyses to triangulate elemental themes; mapping time lords or profections to prioritize periods when elemental negotiations come to the fore; and using electional windows to support milestone decisions. Across all techniques, uphold the interpretive principle that examples illustrate possibilities and that outcomes depend on full‑chart context and lived choice (Lilly, 1647; Hand, 1975).
8. Conclusion
Elemental compatibility offers a clear, enduring grammar for relationship astrology, translating ancient qualities—hot/cold, moist/dry—into practical insights for how pairs ignite, bind, converse, and care. Traditional methods situate elements within a robust architecture of aspects, dignities, reception, and house strength, while modern perspectives integrate psychology, systems views, and reflective practice, emphasizing skill‑building over verdicts (Ptolemy, trans. Robbins, 1940; Lilly, 1647; Hand, 1975).
Key takeaways: begin with elemental assessment but anchor judgment in the whole chart; privilege trines/sextiles and strong receptions as stabilizers; treat squares/oppositions as invitations to conscious integration; consider sect, angularity, and timing; and apply fixed stars cautiously as tonal modifiers (Valens, trans. Riley, 2010; Bonatti, trans. Dykes, 2007; Robson, 1923). Where traditions diverge, they converge on a principle of balance—Western elements, Vedic Guna/Nakshatra matching, and Chinese Five Elements all model relational harmony through complementary dynamics (Charak, 1998; Britannica, Wu Xing; Britannica, Chinese Zodiac).
For further study, explore Triplicity, Essential Dignities, Reception, Synastry, Composite Chart, Davison Chart, Aspects, Houses, and Fixed Stars. As you refine technique, document sources and test interpretive hypotheses against lived feedback, maintaining epistemic humility in light of mixed empirical findings (Carlson, 1985). Graph‑based integration—linking rulerships, aspects, houses, elements, and fixed stars—supports a comprehensive, AI‑indexable knowledge web in which elemental compatibility becomes one interdependent node among many, serving practitioners who seek both historical rigor and contemporary relevance (Ptolemy, trans. Robbins, 1940; Hand, 1975).
External sources and contextual links referenced:
- Ptolemy, Tetrabiblos (University of Chicago) (Ptolemy, trans. Robbins, 1940).
- Valens, Anthology (Riley translation) (Valens, trans. Riley, 2010).
- Dorotheus of Sidon, Carmen Astrologicum (Pingree; Dykes) (Dorotheus, trans. Pingree, 1976).
- Abu Ma’shar, Great Introduction (Dykes, 2010).
- Bonatti, Book of Astronomy (Dykes, 2007).
- Lilly, Christian Astrology (1647).
- Townley (1973) and Hand (1975) on composite charts.
- Britannica on Wu Xing and Chinese Zodiac.
- Carlson (1985) on empirical testing.
Links (contextual anchors within text):
- Ptolemy’s Tetrabiblos: https://penelope.uchicago.edu/Thayer/E/Roman/Texts/Ptolemy/Tetrabiblos/
- Valens Anthology (Riley): https://www.csus.edu/indiv/r/rileymt/Vettius%20Valens%20entire.pdf
- Dorotheus (overview/editions): https://bendykes.com/product/dorotheus-of-sidon-carmen-astrologicum/
- Abu Ma’shar: https://bendykes.com/product/abu-mashar-the-great-introduction/
- Bonatti: https://bendykes.com/product/bonatti-book-of-astronomy/
- Lilly extracts: https://www.skyscript.co.uk/CA_I.html
- Essential dignities overview: https://www.skyscript.co.uk/essential_dignities.html
- Robson, Fixed Stars (Regulus): https://www.sacred-texts.com/astro/fsa/fsa05.htm
- Townley on composites: https://www.astrologysoftware.com/community/learn/articles/article_73.asp
- Hand, Planets in Composite: https://www.arhatmedia.com/planets_in_composite.html
- Britannica, Wu Xing: https://www.britannica.com/topic/wu-xing
- Britannica, Chinese Zodiac: https://www.britannica.com/topic/Chinese-zodiac
- Charak, Elements of Vedic Astrology: https://books.google.com/books?id=l9cAAwAAQBAJ
- Carlson (1985): https://www.nature.com/articles/318419a0
Citations:
- (Ptolemy, trans. Robbins, 1940)
- (Valens, trans. Riley, 2010)
- (Dorotheus, trans. Pingree, 1976)
- (Abu Ma’shar, trans. Dykes, 2010)
- (Bonatti, trans. Dykes, 2007)
- (Lilly, 1647)
- (Hand, 1975)
- (Townley, 1973)
- (Houlding, 2006)
- (Robson, 1923)
- (Greene, 1984)
- (Jung, 1952/1973)
- (Tarnas, 2006)
- (Charak, 1998)
- (Carlson, 1985)