We have not yet reached the stage equivalent to Claudius Ptolemy and Vettius Valens – that is due in the period 2074 to 2148, but in the meantime, horoscopic astrology is in an ascending curve.
The focus in this research is on how the passage of the astrological ages correlates to the changing fortunes of astrology utilizing the sub-periods of the astrological ages – specifically the 1/12 division of the ages into sub-ages, and the respective division of sub-ages into three sub-age decans.
About every 720 years, a new sub-age appears ruled by a Water sign.
Each Water sub-age will have at a minimum, two sub-age decans assigned to Cancer and Scorpio but for two-thirds of the Water sub-ages encountered, either Cancer or Scorpio will also be the parent sub-age.
This twelve-fold division is usually called after the Vedic name of ‘dwadasamsa’ (often abbreviated to ‘dwad’) but the Hellenistic astrologers usually called them ‘dodecatemories’ (which however could also refer to various other divisions due to lack of uniformity by early astrologers).
It is believed that the early Hellenistic astrologers sourced the twelve-fold division of each zodiacal signs from the earlier Babylonian astrologers.
This tightly coincides with the time frame allotted for the development of Hellenistic astrology (i.e.
However, the first age decan of the Pisces age is the Scorpio age-decan (732 – 8 BC) so even in this idiosyncratic Aquarius sub-age, it still has at least Scorpio to comfort it even if sitting in the background.
It is this Aquarius sub-age overflow (551-370 BC) that horoscopic astrology first appeared, on a sole “dah” note!
(For more details on the mechanics of the astrological ages refer to “The Age of Aquarius for Dummies” or conceptualize a multi-layered onion).
The previous sub-age to the Aquarius sub-age was the last sub-age of the Aries age (c.2916 – 732 BC) – the Aries sub-age (c.913-732 BC) as the last sub-age of any age is always the same sign as its parent.