The following is an excerpt from an introduction to Jyotish.
History of Jyotish Sidereal Zodiac/Chart Formats/Indian Mythology
I welcome you to Vedic or Hindu Astrology. You will find many similarities to the astrology you know and even more to Hellenistic Astrology if you encounter that fascinating area of study. Jyotisha is a Sanskrit word. Although there is some controversy about the literal meaning, it is often translated as: Jyoti= light and Isha= soul or spirit; isha is also sometimes translated as god or lord.
Jaimini Astrology has become the second most widely used Vedic Astrology system in use in the Western world, thanks largely to the efforts of Mr. K. N. Rao, P. S. Sastri and others to explain and disseminate this unique astrological system.
This article will illustrate the use of Jaimini astrology for analyzing the spiritual potential of individuals through use of the Jaimini karakas (indicators) in the chart and through the use of Upagrahas ("little planets") in the context of Jaimini interpretation principles.