After doing graduation in physics at PG level you can specialise in any of these subjects- astrophysics, astronomy, nuclear physics, geophysics, applied geophysics, solid state physics, and space physics.
Astrophysics, a specialised subject, is one of the better options for higher studies. It is a branch of astronomy that deals with the physics of the universe, including the physical properties of astronomical objects, such as stars and galaxies.Astrophysics deals with the physical properties of celestial bodies and with the interaction between matter and radiation in the interior of celestial bodies and in interstellar space. It can be broken down into observational and theoretical astrophysics. After taking a Master's degree in the subject, do research leading to a Ph.D. to become an astrophysicist or scientist or research officer in the field of space research.
In Kerala, the School of Pure and Applied Physics of Mahatma Gandhi University, Kottayam, offers an M.Sc. physics course with astrophysics as a specialisation. Some universities offering M.Sc. Astrophysics/Astronomy courses are:
1.Osmania University, Hyderabad - 500 007 (M.Sc. Astrophysics and M.Sc.Astronomy),
2. Swami Ramanand Teerth Marathwada University
Gautami Nagar, Vishnupuri, Nanded - 431 606 (M.Sc. Astrophysics) Integrated Ph.D.
3.The Indian Institute of Science (IISc.), Bangalore
( provides an integrated Ph.D.and research facilities leading to Ph.D. in Astronomy and Astrophysics. )
4.The Indian Institute of Astrophysics, Bangalore (Astronomy and Astrophysics);
5.Harish Chandra Research Institute, Allahabad (Astrophysics);
.6 The Inter-University Centre for Astronomy & Astrophysics, Pune (Physics, Astronomy & Astrophysics);
7.The National Centre for Radio Astrophysics,
8.Tata Institute of Fundamental Research, Pune (Physics, Astronomy, Astrophysics);
9.Physical Research Laboratory