Heliocentric Planetary Aspects and Transits
Heliocentric means Sun-centered, whereas geocentric means Earth-centered. This software, Heliocentric Planetary Aspects and Transits (HPAT) is derived from the author's earlier Planetary Aspects and Transits (PAT) program, and is functionally equivalent to that program, except where heliocentricity implies a difference. For example, in geocentric astrology planets may appear to move backwards (they are then said to be retrograde), but in heliocentric astrology a planet is never retrograde. And in geocentric astrology there are two zodiacs in use, the tropical and the sidereal, and PAT supports both, whereas in HPAT there is just one zodiac.
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The difference between geocentricity and heliocentricity can be illustrated by the charts of the planetary aspects on a certain date as produced by PAT and HPAT. Here are the charts for July 15, 2015:
The Earth is at the center of the geocentric chart, whereas the Sun is at the center of the heliocentric chart. In the heliocentric chart the Earth is located just above Pluto at the bottom.
Three things to note:
- In the heliocentric chart the Earth and Mars are on opposite sides of the Sun, whereas in the geocentric chart Mars is close to the Sun (because the Sun and Mars are in the same direction as seen from the Earth).
- The outer planets (Jupiter, Saturn, Uranus, Neptune and Pluto) are more-or-less in the same position in the zodiac in both charts. That is because the distance between the Earth and the Sun is small compared to the distance from the Earth and Sun to Jupiter and beyond, so the positions (longitudes) of these outer planets are similar whether from the point of view of the Earth or of the Sun.
- The aspects are very different in each chart. The heliocentric chart shows a T-square, which is not present in the geocentric chart.
Here is another example of the difference, the geocentric and heliocentric planetary aspects at 9 am EDT on 'Black Monday', August 24, 2015, at the start of the 1000-point drop in the Dow-Jones Index. The six T-squares (each with a Mercury-Saturn conjunction at the apex) in the heliocentric chart would have suggested a bad day to anyone knowing anything about astrology, and for stock holders and pension funds it was indeed a bad day. The geocentric chart, however, shows a grand trine, usually associated with a favorable situation.
See also a further Comparison of Geocentric and Heliocentric Planetary Configurations
The primary output of the program is the display of the heliocentric planetary configuration for a particular date and time, in both table form and chart form. Here is an example of the chart for 5 am GMT on January 3, 2016:
Lines joining planets show aspects, colored as at right. Colors and orbs are user-selectable. (The "av." value is explained here.)
Clicking on the 'Display table' button produces a tabular representation which provides detailed information about the aspects shown in the chart, as below:
An angle value shows difference of the aspect from exactness (so 0°0' is exact). A '-' or '+' shows whether the aspect is decreasing ('-') or increasing ('+') at the date and time shown, or in other words, whether the aspect is applying ('-') or separating ('+').
Trial version: A free trial version of Heliocentric Planetary Aspects and Transits can be downloaded from this website for the purpose of evaluation of the software. Click on the following link for further information:
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Price and ordering: A single-user license is available for a period of 3 months, 1 year or with no time limit (a 'perpetual' license). Prices for each type of license are given at Purchase a User License. An activation key is required in order to make the trial version fully functional. An activation key can be obtained immediately if you purchase a user license either via PayPal or via Share-it.
Refund: A refund will be provided promptly up to 30 days after purchase if the software does not perform satisfactorily.
Updates: Purchasers of a user license for this software are entitled to an update to any later version at no additional cost.
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