hello aspirant,

See, To become a space scientist, one should possess relevant education in pure science or engineering disciplines. ISRO recruit candidates with PhD in Astronomy, Physics and Mathematics along with engineers in disciplines such as mechanical, electrical, electronics and computer science. So, if you have a PHD degree in the required field then it will really help you in becoming a Sapce scientist.

Most astronauts have a master's degree, and a PhD will significantly improve your chances of reaching the stars . A degree in astrophysics is an ideal starting point for would-be astronauts. Astrophysics is a broad subject that combines physics, chemistry, math, and cosmology.

Further, if you want to learn more about Space sciences and space technology, then consider following the below mentioned link :

https://www.careers360.com/courses/space-technology-course

I hope that this will help.