Software to calculate geocentric and heliocentric astrological aspects,
world transits, personal transits and synastry

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Planetary transits occur when two moving planets possess a particular angular relationship (called an aspect) with each other (e.g. conjunction, opposition, trine, square, etc.) with respect to a central point, which is either the Earth in geocentric astrology or the Sun in heliocentric astrology. A transit (more exactly) is the period during which two planets remain continuously in a particular aspect with each other. These programs either display planetary aspects and transits or calculate the exact dates at which transits occur between selected planets. They are of interest mainly to astrologers, especially financial astrologers (and also to followers of the work of Richard Tarnas), but they are also interesting from a purely astronomical perspective. Click on any of the images below for more information about a particular program. Or to just get short descriptions of these programs visit our Software Shop.

Planetary Aspects
and Transits

Heliocentric Planetary Aspects
and Transits

Your Planetary Transits
Transits for Astro-Trading

Why pay hundreds of dollars for high-priced astrology software when for less than $14 you can be using our informative Planetary Aspects and Transits program? Or for the same amount our Heliocentric Planetary Aspects and Transits program. And why spend many hours poring over ephemeris tables when for the same amount you can get exact dates for geocentric transits (both world and personal) using our Your Planetary Transits program, or exact dates for both geocentric and heliocentric (world) transits using our Transits for Astro-Trading program?

Details of the ranges of admissible dates for these programs are given at Date Ranges.

These programs run under any version of Windows from XP to 10. The freely-downloadable trial versions can be made fully-functional by means of an activation key. The key can be sent immediately upon purchase (or can be obtained immediately after purchase), so there's no waiting required. Updates to new versions are free.

In addition to our software there are several articles concerning astrological aspects and transits and other astrological topics.


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