Indian astronomical science is greatly contributed by Aryabhata (calculating day begins at midnight), Brahmagupta, Varahamihira, Bhaskara (I & II) and others
Not just these even the rules too supported for such with Jantar Mantar at various places as observatories
M.K Vaina Bappu too greatly contributed towards (self built) observatory
Born on today, Dr. ., flew on shuttle and became a permanent star before landing on earth 16 minutes, for aspiring girls looked upto her and want to become , name the person?
Happy Doctors day