The distinction between Astrology and other divinations is that Astrology is based on the actual movements of planets, and has a scientific base. Other forms of divination such as Numerology, Palmistry, Tarot Cards, Psychic Readings, Mediums, Crystal Ball readings etc should not be described as Astrology.
Vedic Astrology has an empirical base and has evolved over a very long time. As human learning about the planets advanced, assumptions were made and hypothesis tested to explain the relationship between humans and the cosmos. The observations and resultant effects were documented as yogas, and at the moment there are some 40,000 of these being used for predictive purposes.
Vedic Astrology is based on the philosophy of Karma, with its doctrine of reincarnation and the soul’s attainment of Nirvana. In Vedic civilisation, Astrology forms the very basis of daily life so that man might harmonise his life with the laws of nature.