

Over the years, people have proposed many different formulas for calculating the divisions with both of these methods. Another method is to divide the space inside the Earth’s atmosphere into 12 sections, like sections of an orange. House systems that focus on this method are called “time-based” systems. One method is to divide a day’s time (24 hours and 1 complete revolution of Earth about its axis) into 12 divisions.

The purpose of the astrological houses is to divide our reality into sections. It is believed that we exist in time and space. Several methods exist for calculating the line divisions between the houses (house cusps), and not all astrologers use the same method. Most astrology charts are made of a map of the heavens overlayed upon a circle of 12 houses ( see explanation of a Chart Layout).
