Century and John Holywood in the 13th
Definition
Century and John Holywood in the 13th refers to John of Holywood, better known by the Latinized name Johannes de Sacrobosco, a 13th-century scholar associated with medieval astronomy. His influential work De sphaera mundi, or On the Sphere of the World, presented the structure of the heavens, celestial circles, planetary motions, eclipses, and the spherical Earth in an accessible textbook form.
Astrological Meaning
This phrase does not name a planet, placement, aspect, or predictive technique. Its astrological relevance is historical: Sacrobosco’s description of a geocentric, spherical cosmos helped transmit the astronomical framework used by medieval astrologers. Understanding the zodiac, horizon, meridian, celestial equator, and planetary spheres was essential for calculating and interpreting horoscopes. Although his work supported the cosmology surrounding traditional astrology, it was primarily an astronomical introduction rather than a complete manual of natal interpretation.
Why It Matters
John of Holywood provides context for how astrology was studied in medieval Europe, when astronomy and astrology shared mathematical concepts and educational settings. Recognizing his contribution helps readers distinguish the calculation and description of celestial motion from the symbolic interpretation of a natal chart. It also clarifies why traditional astrological texts often assume familiarity with spherical astronomy and classical cosmology.
Related Encyclopedia Entries
- Traditional Astrology
- Astrological Terminology
- Natal Chart
- Medieval Astrology
- Geocentric Model
- Zodiac
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