Expanding the relationship between our hearts and minds and the planets is an allegory for experiencing the relationship between spirit and the various aspects of our personalities. If the planets in these meditations are viewed as symbolic keys to open us to a deeper understanding of ourselves, then these meditations will have an enlightening effect.
I have met hardened scientists working on space travel and exploration who sub-consciously ascribe personality attributes to the planets. Without arguing for or against the efficacy of astrology, I must admit having incredibly beautiful meditations sitting outside on a summer night and focusing on one or another of these heavenly bodies. They did each seem to have a unique consciousness that was both visceral and mentally stimulating.
These meditations are designed to foster a relationship with the planets.