Ancient Indian astronomy; a practitioner is a Jyotishi

from Jyoti (the light). The science of the Light or Stars. Vedic Astrology

Jyotisha (, in Hindi and English usage Jyotish) is the Hindu system of astrology, one of the six disciplines of Vedanga, and regarded as one of the oldest schools of ancient astrology to have had an independent origin, affecting all other schools in and around India. The Sanskrit word derives from jyótis (disjointed as "Ja"+"Ya"+"O"+"T"+"ish" to get the root meaning as "water or birth"+"in addition to" + "earth" and "stars" + "knowledgeable" equating as one who is knowledgeable, or enlightened with knowledge, of birth, fate, and relationship to water, earth and stars) or which means "light, brightness", but in the plural also "the heavenly bodies, planets and stars".