Hi Swetha,
Astrophysics is not a subject which your should study by distance learning program,you should must go to university for regular classes.Some good colleges in Kerala for Astrophysics are:-
1-Cochin University of Science and Technology ,Kochi.
2-Indian Institute of Space Science and Technology - Thiruvananthapuram, Kerala.
3-Jawaharlal College of Engineering and Technology,Kerala.
4-Vikram Sarabhai Space Centre ,Thumba, Thiruvananthapuram, Kerala.
5-Pondicherry University - Pondicherry (Mahe), Kerala.
6-National Institute of Technology Calicut - Calicut, Kerala.
7-Kerala University - Thiruvananthapuram, Kerala.
Hope this will help,please feel free to ask if you have any further queries.
Thank You.
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