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Section 3 of 14
Sky & Cosmos
Astrology in its Western, Vedic, Chinese and Mesoamerican forms, and the sky it all reads from.
This section covers the reading of the sky: Western astrology and its Hellenistic ancestry,
Vedic jyotiṣa, Chinese astrology and BaZi, Mesoamerican calendars, and the long argument about
whether any of it corresponds to anything.
It is the most widely known material on the site and the most widely misunderstood, in both
directions. Most people who dismiss astrology are dismissing the newspaper column, which
practitioners also dismiss. Most people who follow it have never encountered the fact that the
two largest traditions disagree about which sign they were born under.
That disagreement is where this section starts, because it is more instructive than any argument
about validity. Western astrology anchors its zodiac to the equinox; Vedic astrology anchors its
to the fixed stars; the two have drifted roughly twenty-four degrees apart over two thousand
years. The same person, the same moment, the same sky — and two systems with equally long
pedigrees returning different answers. Whatever is going on, at most one of them can be reading
the sky the way it claims to.
Three things this section will do consistently.
It separates the traditions from the product. Horoscopic astrology is a technical discipline
with a documented two-thousand-year history, an enormous literature, and internal disputes as
sharp as any in this site's territory. Sun-sign columns are a 1930s newspaper invention. Treating
them as the same thing insults both.
It reports the evidence plainly, including where it is messier than either side admits. The
controlled tests have been negative, and the most famous positive result — Gauquelin's Mars
effect — is a genuinely tangled episode in which the sceptical organisation testing it behaved
badly enough to become part of the story.
It takes the history seriously. Astronomy and astrology were one subject for most of their
existence. Kepler cast horoscopes for a living while deriving the laws of planetary motion, and
the split between the two disciplines is far more recent and far less clean than the modern
framing suggests.