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The concept of Ruling Planets (RPs) work on the idea of communion of microcosm and macrocosm. Philosophically, Idea is something that is self-proved. It can’t be refuted nor can be proved by some or other way. In mathematics there is an idea of Number. We have not seen One, Two, Three etc numbers. When not seen, there is no way of proving or refuting except accepting the idea as an axiomatic truth. As soon as the idea of One number is imposed on a thing, it becomes quite evident and begins to work for the purpose. Likewise, there is an idea of synchronicity with the Supreme Mind which works only when an individual really need help from his Higher Self. Due to synchronicity, when an individual needs something, the entire cosmos conspires in helping him to achieve the same. An astrologer imposes this idea of synchronicity on co-ruling planets of Moon’s position and Ascendant at the time of event to achieve the purpose. These co-ruling planets of Moon’s position and Ascendant are called RPs of Moon Position and RPs of Ascendant Position.

Many astrologers try to find the worth of Ruling Planets in light of Pre-Natal Epoch Theory or the concept of Adhana Lagna which says that the position of Moon at the moment of Epoch gets exchanged with that of Ascendant at time of birth and the position of Ascendant at Epoch is taken by the Moon at the time of birth. Whatever be the reason, astrologically, role of co-rulers of Moon and Ascendant position are important and quite convincing too.

Astrologically speaking, any event takes place at a particular moment and at that particular moment Moon occupies a particular degree, minute and second. On this degree, minute and second a particular Sign Lord, Star Lord, Sub Lord and Sub-Sub Lord rise. Moon’s Position co-rulers decide the Cuspal position including Ascendant at the time of event. The moment of happening of an event is defined by the co-ruling planets of Ascendant, which is virtual position of Sun caused by the interplay of Moon and Sun. Conversely, Ascendant co-ruling planets help in fixing the planetary position at the time event.

As such, In Sub-Sub Theory (Khullar Astrology), there would be four planets (Sign Lord, Star Lord, Sub Lord and Sub-Sub Lord) to co-rule the Moon Position, which are meant for fixing correct planetary position at time of event. And, four planets to co-rule Ascendant position for the purpose of fixing correct Cuspal position. Apart from this, those planets would also be Ruling Planets who qualifies to be ruling planet. In Khullar Astrology, retrogression of planet is not considered. So, even retrograded planet also is a bonafide contender for Ruling Planet (RP). In this theory Day Lord is also not considered as ruling planet.

Ruling Planets are used by astrologers to fix the time of event of the past or future. So, Ruling Planets can be used in birth time rectification as well as timing of event through Horary Chart or Natal Chart. As per my experience, which needs more research and observations, while timing the event of past or future, if two or more strong planets are becoming strong significator of the event, in that case, preference should be given to that ruling planet who is placed in Cardinal Sign, then preference should be given to Mutable Sign and in the last to Fixed Sign. If the said strong significators are in same sign then priority should be given to the planets coming naturally in chronological order in Vimshottari Dasha System.