Planetary Strength - a commentary on Morinus is an intermediate level textbook on natal horoscope interpretation. Taking as its point of departure Astrologia Gallica by Jean Baptiste Morin de Villefranche (1583 - 1656), Planetary Strength explains the differences between the strengths conferred upon planets by virtue of their sign placements (celestial state), house placements (terrestrial state) and aspects (aspectual state).
The strength factors of retrogradation / station, synodic phase, and conjunction with fixed stars are also explained and interpreted. A detailed system of keywords is augmented by insightful "cookbook" interpretations for each and every planetary combination. The depth and quality of the analysis - as well as the hundreds of practical examples and tips - make Planetary Strength an essential reference work which both neophyte and experienced practitioners will consult every time they read a horoscope.