Sir, I am student of B.SC(physics). I want to know that can I do M.SC in Astrophysics through IIT-JAM. Sir, please give me correct guidance because it's very important for my career.

Hi there!
 
For a career in space science, students need to have enough knowledge of physics, maths and engineering techniques in general. Students generally require a BE or B.Sc degree in physics/electronics t aply for astrophysics courses.
To pursue a career in theoretical astronomy, one can pursue a Bachelor’s in Science in physics and/or mathematics, while in order to pursue a career in experimental astronomy, one can pursue a Bachelor’s in Engineering in electrical/electronics/electrical communi-cation, after ten plus two.
You have to clear Entrance test also other than your marks percentage which would be considered for your admission in the institute.