I want study astrophysics ? I want learn about sky and become astronaut

The link below has the best information I found about becoming an astrophysicist in India.
https://www.iiap.res.in/opportunities/career

Regarding becoming an astronaut, check the link below.
http://www.indianyouth.net/how-to-become-an-astronaut-in-india/

Hi Aishwarya,
Thankyou for your question .

Astrophysics is the branch of astronomy concerned with the physical nature of stars and other celestial bodies, and the application of the laws and theories of physics to the interpretation of astronomical observations.

It is desirable for a student to acquire proficiency in physics and mathematics at the graduate level and then to Astronomy & Astrophysics specialization. An engineer with a B.Tech or B.E. degree, with an aptitude for Astronomy and Astrophysics, can also enter the field as a research scholar

All the best.