Hey shweta! Considering that you want to do astrophysics only from the colleges of india. Then some of the best colleges for B.Sc astrophysics are:

• Punjab university
• Osmania university
• JNTU college of engineering , hyderabad
• Indian institute of astropgysics , bangalore
• Astrophysics , tata institute of fundamental research , pune

In case of further queries , feel free to get back to us.