What Is Dev Gana In Astrology - Planeticthus Tarot Reading ... What Is Dev Gana In Astrology. February 16, 2021 by Liz Dean. Astrology is the study of celestial bodies as they move through the skies at various stages of their journeys. It's based on the ancient Greek's concept of the world as having a fixed physical pattern that cannot be changed, even though it is believed that it might be impacted by ...