Edited sentence: & he was the most famous astrologer at that time.Amongst other works, he is most famously known for  Āryabhaṭia, a treatise that included Geometry and Trigonometry along with Arithmetic & Algebra.Brahmagupta, another great mathematician, made further advances in astronomy,  and wrote Brahmasphutasiddhanta(The Opening of the Universe) and Khandakhadyaka...His contemporary Varahamihira wrote Pancasiddhantika (The Five Astronomical Canons) - a treatise on mathematical astronomy and it summarises five earlier astronomical treatises, namely the Surya, Romaka, Paulisa, Vasistha and Paitamaha siddhantas.His work Brihatsamhita (The Great Compilation) discusses topics such as descriptions of heavenly bodies, their movements and conjunctions, meteorological phenomena and then indications of the omens these movements, conjunctions and phenomena represent, what action to take and operations to accomplish, sign to look for in humans, animals, precious stones, etc.His work on astronomy was also pioneering, and among many theories he was the first to suggest that diurnal motion of the 'heavens' is due to rotation of the earth about its axis.In India, the main Sulbasutras were composed by Baudhayana (about 800 BC), Manava (about 750 BC), Apastamba (about 600 BC), and Katyayana (about 200 BC), though essentials of this geometry were older being contained in the altar constructions described in the Vedic mythology text the Shatapatha Brahmana and the Taittiriya Samhita.It has been shown that the study of mathematical astronomy in India goes back to at least the third millennium BC and mathematics and geometry must have existed to support this study in these ancient times.The Harappans had adopted a uniform system of weights and measures and Several scales for the measurement of length were also discovered during excavations.The Āryabhaṭia was translated into Arabic by Abu'l Hassan al-Ahwazi (before 1000 AD) as Zij al-Arjabhar.Yativrsabha (or Jadivasaha), a Jaina mathematician in his work Tiloyapannatti wrote various units for measuring distances and time and also described the system of infinite time measures.Āryabhaṭa was a pioneer of the revival of Indian mathematics, and the so called 'classical period', or 'Golden era' of Indian mathematics