Astrology continued...

The general idea in astrology is that events on earth of a certain nature coincide in time with astronomical events of a similar nature (according to the symbolic significance of the planets and their relations in the heavens).

Although synchronicity operates throughout the universe, the planets might have special significance because they are part of collective experience (that is, we can all see them or know about them) and so they can take on a collective meaning -- they can speak to the "collective unconscious." But Jung's synchronicity principle and the related one that is applied to the astrological question are still hypothetical and still not well understood.

Jung's idea is similar to the ancient hermetic idea of resonant bonds of sympathy between "similars" (which share a common essential design) in the microcosm and macrocosm. This was the ancient explanation for the correspondence between cosmic and mundane events. A less popular explanation is that there are unknown and currently undetected forces or energies emanating from the planets that affect life on earth, perhaps something akin to Rupert Sheldrake's "morphic fields." (This type of explanation is unpopular among those physicists who believe that all the forces in the universe are already known.)

Biological evidence showing a harmony between celestial rhythms and biological rhythms suggests that known or unknown planetary forces operate on organisms at a material level, sometimes through changes in the pattern of solar radiation. Such biological effects might alter psychological processing and thus human action and the events that arise from it. Whatever explanation is offered, it is evidence from experience and research that convinces people that astrology does indeed work.

The rich descriptive theory that has evolved over thousands of years provides for a deep understanding of human nature and the capacity for prediction of the type of circumstances that will prevail during specific time periods. As with most areas of inquiry, the correct explanatory theory to account for the structure of the descriptive theory awaits its discoverer.