MS.c in Astrophysics is a 2 years full time post graduation course which are not offered by many colleges in INDIA.

This is a very complex & important course in future, Students are well trained about astrophysics and scientific analysis.

Admissions are given on basis of the written tests conducted by various institutes. The candidate who wishes to join this program must have completed graduation in Science i.e. BSc in any field from a recognised University/ Educational Board.

If you pass in the written tests the institute call you for a Personal Interview. You must perform well here too. If all goes good you will be admitted.

So to sum up , YES you Can do M.Sc in Astrophysics even after completing B.Sc in Instrumentation.

Thank you & ALL THE BEST!!