So what’s the difference between astrology and astronomy? Astrology refers to the ‘astro-logos’ or star word, that the ancients experienced in the movements of planets and stars around the Earth. The 'astro-nomia' of the scientific revolution concerned itself not with divine spiritual beings, but with the physical properties of celestial objects, and things like gravitational force or the distance of objects and the speed of light, and our physical, rather than spiritual, origins.