10 Ancient Indian Astronomers

1. Aryabhata (476–550 CE):
2. Varahamihira (505–587 CE):
3. Brahmagupta (598–668 CE):
4. Bhaskara I (600–680 CE):
5. Bhaskara II (1114–1185 CE):
6. Madhava of Sangamagrama (c. 1340–1425 CE):
7. Nilakantha Somayaji (1444–1544 CE):
8. Jyesthadeva (c. 1500–1610 CE): 
9. Ganesha Daivajna (16th century CE): 
10. Sawai Jai Singh II (1688-1743 CE): 

Who is a famous astronomer of ancient India?

Aryabhata I (ad 476) is one of the greatest mathematicians and astronomers of ancient India.