Dear aspirant,

As per the information given on the official website of IIT JAM, you are eligible to take admission in MSc Astronomy in IIT Indore provided that you have studied physics for 6 semesters and Mathematics for atleast 2 semesters. As of now, no information has been released whether IITs provide a separate course in Astrophysics so you can consider other universities for your desired course.

Hope this helps!