Hii,
Yes, you can do MTech in Astronautical Engineering after a BS-MS in Astrophysics (Physics), but it depends on the college.
Most MTech programs in India expect a BTech degree, but some IITs and IISc offer interdisciplinary or research-based MTech/MS programs where Physics students are eligible.
You may need to appear for GATE in Physics (PH).
Always check the specific eligibility criteria of the college you're applying to.
If you’re open to studying abroad, many universities accept Astrophysics students for MS in Aerospace/Astronautics.
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