Hey,

Tata Institute conducts it's own exam under the name TIFR which is responsible for admission into various courses offered by the college. The minimum eligibility criteria to take admission into astrophysics is that you need to have completed your graduation from science related stream.

You need to apply for the TIFR exams once the forms will be out. After clearing the cut off you will be called for the interview and if you will clear the interview you will be allotted admission in the respective college.

Hope that helps.

Thank you.