Āryabhaṭīya

Āryabhaṭīya is a seminal work on mathematics and astronomy composed by the Indian mathematician-astronomer Āryabhaṭa in 499 CE. It is one of the earliest texts to present a systematic and computational approach to astronomical phenomena, including planetary motions, eclipses, the lunar and solar calendars, and trigonometry. Written in concise Sanskrit verses, it combines mathematical precision with astronomical insights, laying the foundation for later Indian and Islamic astronomy.

The work is divided into four chapters (pāda-s), covering fundamental mathematics, arithmetic and algebra, planetary models, and spherical astronomy. Each chapter builds upon the previous, offering both theoretical frameworks and practical algorithms for astronomical calculations.

Chapters

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