<Tr> <Th> Name </Th> <Th> Year </Th> <Th> Contributions </Th> </Tr> <Tr> <Td> Lagadha </Td> <Td> 1st millennium BCE </Td> <Td> The earliest astronomical text--named Vedānga Jyotiṣa details several astronomical attributes generally applied for timing social and religious events . The Vedānga Jyotiṣa also details astronomical calculations, calendrical studies, and establishes rules for empirical observation . Since the texts written by 1200 BCE were largely religious compositions the Vedānga Jyotiṣa has connections with Indian astrology and details several important aspects of the time and seasons, including lunar months, solar months, and their adjustment by a lunar leap month of Adhimāsa . Ritus are also described as ((yugams)). Tripathi (2008) holds that' Twenty - seven constellations, eclipses, seven planets, and twelve signs of the zodiac were also known at that time .' </Td> </Tr> <Tr> <Td> Aryabhata </Td> <Td> 476--550 CE </Td> <Td> Aryabhata was the author of the Āryabhatīya and the Aryabhatasiddhanta, which, according to Hayashi (2008):' circulated mainly in the northwest of India and, through the Sāsānian dynasty (224--651) of Iran, had a profound influence on the development of Islamic astronomy . Its contents are preserved to some extent in the works of Varahamihira (flourished c. 550), Bhaskara I (flourished c. 629), Brahmagupta (598--c. 665), and others . It is one of the earliest astronomical works to assign the start of each day to midnight .' Aryabhata explicitly mentioned that the earth rotates about its axis, thereby causing what appears to be an apparent westward motion of the stars . In his book, Aryabhatiya, he suggested that the Earth was sphere, containing a circumference of 24,835 miles (39,967 km). Aryabhata also mentioned that reflected sunlight is the cause behind the shining of the moon . Aryabhata's followers were particularly strong in South India, where his principles of the diurnal rotation of the earth, among others, were followed and a number of secondary works were based on them . </Td> </Tr> <Tr> <Td> Brahmagupta </Td> <Td> 598--668 CE </Td> <Td> Brahmasphuta - siddhanta (Correctly Established Doctrine of Brahma, 628 CE) dealt with both Indian mathematics and astronomy . Hayashi (2008) writes:' It was translated into Arabic in Baghdad about 771 and had a major impact on Islamic mathematics and astronomy .' In Khandakhadyaka (A Piece Eatable, 665 CE) Brahmagupta reinforced Aryabhata's idea of another day beginning at midnight . Bahmagupta also calculated the instantaneous motion of a planet, gave correct equations for parallax, and some information related to the computation of eclipses . His works introduced Indian concept of mathematics based astronomy into the Arab world . He also theorized that all bodies with mass are attracted to the earth . </Td> </Tr>

Who was the famous indian astronomer who discovered that earth revolves on an axis