Astrology Course – Chapter 4 In this chapter the extended study of planet is done. Here you will be explained the Elements, Aspects, Relationship of planets and also Shastra. Topics: Archaeological control of Planets on Earth. Relationship between planets Aspects of planet Shasthra Planet influence on Labor and Trigunas of mind. Planet – Relationships. You can browse topics from here clicking them. Archaeological control of planet on Earth Relationship between Planets. Aspects of Planet. Shasthra. Planet influence on Labor and Trigunas of minds. Planet – Relationships.