Chris Brennan is a graduate of Kepler and the current the Vice Chair of the Kepler Board of Trustees. He recently released Hellenistic Astrology: The Study of Fate and Fortune and is the host of the award-winning Astrology Podcast.
Introduction to Astrology
Instructor: Adam Elenbaas
A number of modern astrologers wonder why there is a big push for ancient astrology. Our current methods work great. But many older methods have been lost because no one was interested in translating ancient astrological techniques. But this changed beginning in the late 1970s, particularly with the work of Robert Hand, Robert Zollar and Robert Schmidt and with today's translators like Benjamin Dykes. We now have enough information to start testing older methods and determining what is or is not useful. Once you get used to some new vocabulary, it turns out there is a wealth of new tools and approaches that we can readily use today.
The daily countdown to the Presidential election has started in earnest. It's the season of prediction, so of course astrologers are feeling right at home. Since the Presidential Panel in May at UAC 2012 to the latest commentary in blogs, newsletters and the Huffington post, astrologers have used a wide variety of indicators to determine how the candidates will fare. Below I have highlighted a few of the more interesting columns that present a variety of techniques, from modern to ancient, Western to Vedic. Although most predict President Obama will win, no one thinks it is going to be an easy path.
The Harmonics  is probably earlier than the Tetrabiblos. Although Ptolemy is well known for his astronomy and astrology, he was also one of the ancient sources for theories of harmony.
The work studies this universal field of knowledge for which music and geometry are considered subsets. Much of the material in Harmonics is exclusively concerned with music, including setting up exact number ratios for the different modes.
The Harmonics Book III applies his previous exposition of intervals, scales, and ratios to ethics and psychology, and to astronomy and astrology. Unfortunately, some of Book III has been lost to us. In Chapter 9 of Book III, Ptolemy presents the astrological aspects and their ratios to one another. Curiously, in this presentation Ptolemy does not use degree numbers for the aspects. Instead, he considers the twelve zoidia as discrete units and the whole number relationships between them that yield moriai and epimoriai. This discussion might have fit better into the Tetrabiblos Book I, within his treatment of the qualities and relationships between whole zoidia.