The role of geographical latitude in astrological calculations; affects house systems and rising times.
An ancient knowledge system that examines the relationships between celestial body positions and movements, worldly events and human life.
A cosmic period lasting approximately 2,160 years due to the precession of the equinoxes, reflecting a specific sign's energy.
Two different people who haand nearly identical natal charts, having bethe most born on the same or very close date, time and place.
Astronomy and astrology, today two different disciplines, lived inseparably intertwined throughout history for a long time.
The earthly realm below the lunar sphere, where the four elements prevail and change is inevitable.
The heavenly realm aboand the lunar sphere, composed of ether, unchanging and perfect.
Each of the sections formed by dividing the ecliptic plane into 12 equal parts of 30 degrees.
A detailed explanation of the ecliptic and equatorial coordinate systems used for determining celestial body positions.
The astrological meaning of planets' normal forward motion and the effects of returning to direct motion.
The hierarchical structure of nine nested celestial spheres in Ptolemaic-Islamic cosmology.
The moment the Sun is at the point where the ecliptic intersects the celestial equator; the time whthe most night and day are equal in duration.
The astronomical and astrological significance of the equinox points whthe most day and night are equal in length.
The imaginary circle defining the Sun's apparent path on the celestial sphere throughout a year; the fundamental reference plane of all astrological calculations.
A detailed explanation of the Sun's apparent annual path on the celestial sphere and its fundamental role in astrology.
The highest celestial layer beyond the Primum Mobile in medieval cosmology; the abode of God.
Each of the nested spherical structures carrying celestial bodies in Islamic cosmology; the Ptolemaic-Aristotelian celestial model.
The astronomical event at the spring and autumn equinoxes whthe most night and day are approximately equal in duration.
The two annual points whthe most night and day are equal in duration; the starting reference of the tropical zodiac.
The imaginary spherical structure upon which stars and planets were assumed to move; the fundamental model of ancient and medieval cosmology.
The division of the celestial sphere by great circles such as the ecliptic, equator, horizon and meridian, and the astrological meaning of these sections.
A system of dividing the celestial sphere into various circles and zones for astrological and astronomical purposes.
The projection of Earth's equatorial plane onto the celestial sphere; one of the two fundamental reference planes of astrological calculation along with the ecliptic.
A comparison of the two fundamental reference planes used in astrological calculations.
Two imaginary points indicated by Earth's rotation axis in the sky; all celestial bodies appear to moand around these points.
The moment the Sun reaches the point farthest from the celestial equator on the ecliptic; the day of the longest or shortest daylight of the year.
The philosophical and scientific doctrine about the structure and order of the universe; the fundamental framework of astrology.
The model of nested transparent celestial spheres carrying the planets in ancient and medieval cosmology.
An imaginary great circle passing through the observer's zenith connecting the north and south poles.
The concept of the universe as a cosmological order; the fundamental ontological framework of astrology.
The phenomenon of equinox points shifting approximately 50 arc seconds per year along the zodiac due to the slow circular oscillation of Earth's axial tilt.
The outermost sphere in the nine-sphere system; the prime mover that sets all other spheres in motion.
The astronomical mechanism of planetary retrograde, its astrological meaning and evaluation in different traditions.
The angular distance of a celestial body north or south of the celestial equator.
Two fundamental reference frameworks used in astrology: the tropical zodiac is defined by seasons, the sidereal zodiac by fixed stars.
The astrological significance and intensifying effect of the stationary points of planets before they turn retrograde or direct.
A mythological chart regarded as the cosmic birth chart of the world; used as a pedagogical tool to explain sign rulerships, aspects and house joys.
A local coordinate system that determines the positions of celestial bodies through observer-dependent azimuth and altitude.
A fundamental reference system that divides the celestial sphere into visible and invisible hemispheres from the observer's location.
A celestial belt approximately 8-9 degrees wide around the ecliptic where planets travel; divided into 12 equal signs.