Hey,
Masters in Astrophysics is a two year programme. It equips a student with the thorough  aspects of astronomy and critical research-oriented attitude.
The eligibility criteria required for admission to this course is graduation completed with science from a recognised university with a minimum aggregrate score of 50 per cent.
Some of the universities that offer Masters in Astrophysics are Osmania University,Andhara University,Punjabi University.
Admission to the course is conducted in 2 stages- Institutional Test and Personal Interview .
Hope this helps.
Good luck.

Dear Student,

Yes you should have a bachelor's degree in science stream to take admission in Msc in Astrophysics with 50% marks in aggregate from a recognised university. Some institute take admission on the basis of merit and some take on the basis of admission test followed by the interview, on the basis of which final admission process is carried forward.