Astronomy
Dignities, orbs, glossary, tables and techniques
Retrograde Motion of the Planets: Astronomy, Cycles, and Interpretation
Apparent retrograde motion as a geocentric effect: direct, stationary, and retrograde states, stations, shadow periods, synodic cycles, and the orbital geometry of inferior and superior planets. Covers the retrograde patterns of Mercury through Pluto, natal interpretation, transit passes, progressions, electional practice, common mistakes, and a verification checklist.
The Zodiac as a Coordinate System: Ecliptic, Equinoxes and Precession
The zodiac as an astronomical coordinate system: the ecliptic and its obliquity, equinox and solstice points, tropical versus sidereal zodiacs, precession and ayanamsa, and the twelve signs as 30-degree sectors. Sign-versus-constellation distinction, longitude-to-sign conversion, practical consequences for chart calculation and interpretation, worked examples, common mistakes and a checklist.
Eclipses: Types, Nodes, Seasons and Saros Cycles
Eclipses as both astronomical events and astrological markers: solar and lunar types, the role of the lunar nodes, eclipse seasons and the saros cycle. Includes an interpretation method for natal and predictive charts, the eclipse degree, the eclipse corridor, a worked example, a checklist and common mistakes.
House Systems in Astrology: Whole Sign, Equal, Placidus, Koch and Others
Astrological house systems compared: whole sign, equal, Porphyry, Alcabitius, Regiomontanus, Campanus, Placidus, Koch and topocentric. Calculation logic, space-based versus time-based methods, high-latitude behavior, selection criteria, a step-by-step example, practical consequences and common mistakes.
Lunar Phases: The Eight Phases, Exact Angles, Cycle and Practice
Lunar phases as a measurable function of Sun–Moon elongation: exact boundaries of the eight phases, synodic and sidereal cycles, illuminated fraction, the natal phase and its interpretation, the progressed lunation cycle, transit and electional practice. Includes calculation methods, worked examples, priority tables, common mistakes and a checklist.