Indian astronomy

Indian astronomy refers to the study of astronomy in the Indian subcontinent, as documented in literature spanning the Maurya (Vedanga Jyotisha, ca. 3rd century BCE) to the Mughal (such as the 16th century Kerala school) periods.The astronomy and the astrology of ancient India (Jyotisha) is mainly based on a sidereal system of calculations. A tropical system has also been used in a few cases. For example, a tropical determination of the Uttarayana (Uttarāyana उत्तरायन) is found in the Mahabharata, and also in the Vedanga Jyotisha of Lagadha, but not in subsequent systems, which have been sidereal.
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