Jyotish means 'light of Ishwara'. As light enables us to see in the darkness, this divine light helps in peeping into the future. This divine light comes within us in the form of gyan. Alternatively, Jyotish is gyan of Ishwara, who is regulator of cosmic laws and gyan of divine laws is Jyotisha.
Nakshatra Jyotish gives importance of Nakshatra (star). In Stellar Astrology, it is believed that planet gives its result on the strength of it star lord. Krishnamurti introduced this system. Later, further works done by stalwarts and Cuspal Interlinks Theory like research work also became popular.
Nadi Astrology is ancient system of Astrology. It is believed that Bhrigu Rishi has introduced this system in Treta Yuga while Parashari Jyotish came into existence in Dwapar Yuga. In Bhrigu Nadi, there is direct approach towards the Planets. Intelligent use of Karkattwa results in astonishing predictions.
Lal Kitab is a wonderful part of Indian Astrology giving us sound astrology principles meant for prediction and remedies. The symptomatic hints of Lal Kitab are quite helpful for prediction and remedial measures (upay). Lal Kitab has been introduced by Pt. Roop Chand Joshi in nice way.
A brave, enthusiastic, hard-working and ambitious person kept toiling and did all the efforts without being idle and frustrated or looking towards the heaven for help yet he failed in getting desired result. And, when he saw persons even of lower caliber getting huge success in no time, he understood the secret. When fortune shines, irrespective of capability and qualification, even a beggar becomes king. Pt. Roop Chand Joshi, Lal Kitab.