Jyotish (Vedic Astrology) is not about mundane future predictions. Those can easily be obtained by any oracle- divinations!!! Jyotish, The Science of Light; is meant to help us understand our Karmic past, so we can work towards resolving those challenges and speedily move forward in our path of conscious living (as true divine beings).
These celestial bodies are called grahas since they cause as well as show the effects of our karmas (past, present and future) on our soul, that seem like “grahan”, which means eclipse. We know that if we did not have “karmas” to experience, correct or resolve, then we would simply be: our core divine essence- Pure Light. i.e. each one of us, the individual conscious soul, Jeev-atma (microcosm) would be the same as the Absolute Consciousness, Param-atma (macrocosm).
So basically, these grahas show the “cause and effects” of our karmas, which then behaves as a “grahan or eclipse” on our soul, our divine essence. By understanding these Grahas, their qualities and how they impact us in our individual lives, we can chalk out our past karmic map and then by taking appropriate steps to clear and resolve, we can speedily move ahead in our conscious living journey.