![]() ![]() ![]() Particularly important in the development of Western horoscopic astrology was the astrologer and astronomer Ptolemy, whose work Tetrabiblos laid the basis of the Western astrological tradition. Ptolemy explained the theoretical basis of the western zodiac as being a tropical coordinate system, by which the zodiac is aligned to the equinoxes and solstices, rather than the visible constellations that bear the same names as the zodiac signs. 50 BC, is the first known depiction of the classical zodiac of twelve signs. The Dendera zodiac, a relief dating to ca. Horoscopic astrology first appeared in Ptolemaic Egypt. The Babylonian star catalogs entered Greek astronomy in the 4th century BC. Knowledge of the Babylonian zodiac is also reflected in the Tanakh (Jewish Bible), and is the first recorded astrological division into 12 constellations, elaborated on in the Talmuds (= “learning”, a collection of writings named specifically the Babylonian Talmud), Midrash Rabba (books of the Tanakh), and other minor works. ![]() This is the reason why the “first sign” in Astrology is still called “ Aries“, even after the vernal equinox has moved away from the Aries constellation due to the slow precession of the Earth’s axis of rotation. A SHORT HISTORICAL TIME-LINE:ĭuring the early 1st millennium BC the Babylonian astronomers divided the ecliptic into twelve equal zones of celestial longitude to create the first known celestial coordinate system. The Babylonian calendar as it stood in the 7th century BC assigned each month to a sign, beginning with the position of the Sun at vernal equinox, which at the time was depicted as the Aries constellation (“ Age of Aries“). The Zodiac is an ecliptic coordinate system, which takes the ecliptic as the origin of latitude, and the position of the Sun at vernal equinox as the origin of longitude.Īstrologers track the planets as they continue on in the sky after birth, moving through the houses of the natal chart as they progress through the zodiac. The zodiac is the circle of constellations traversed by the sun, moon and planets in their yearly cycle, as seen from Earth. Traditionally his circle is divided into 12 sections of 30 degrees each, the Zodiac signs. THE ZODIAC (INTRODUCTION) | HISTORICAL PERSPECTIVE | PTOLEMY | MARSILIO FICINO | RUDOLF STEINER | MAX HEINDEL | ANNY VON LANGE | SIGISMUND VON GLEICH | MARIUS SCHNEIDER | ALAIN DANIELOU | STOCKHAUSEN | HENSHEL & HENSHEL-FISHER | MCMULLIN | ASPECTS, SIGN-GROUPS, MODES & DEGREES | JOHANNES KEPLER | RUDOLF HAASE | SUMMERY TIMELINE | GEOMETRY & GROUPS | CHROMATIC SCALE, THE PIANO AND MONTHS OF THE YEAR | All dates, numbers and frequencies mentioned in this blog article are an approximation.The exact dates that cover the periods of the Zodiac Signs might differ, that depends on the system used.The seasons mentioned in this article are as the are at the Northern hemisphere (North of the Equator).This article is an ongoing “ work-in-progress” … and because I am no “expert” in astrology I do welcome additional info, suggestions and corrections (in case of mistakes made in this article). This article is in the first place written for musicians that – like myself – are intriqued by this topic and perhaps for some astrologers it might turn out to be an interesting read as well. I am not an astrologer or astronomer (I am but a musician-composer and sound engineer with a keen interest in this subject). ![]()
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