See if you wish to go for the Space science, then formally there are no courses available which offers directly Msc in space science. Some of the courses involving space science in MSc courses is mainly Astrophysics. Now for the Astrophysics most university prefers a Physics degree.

I would suggest you to complete your course of MSc Electronics. Then you can appear for the GATE and can take admission in the MTech programs of the Indian Institute of Space Science and Technology. After the completion of the course, you can work in ISRO IIST provides direct placement to ISRO if one have CGPA above 8) which obviously will involve your passion of space science and Electronics.

Another way is you can take lateral entry admission in the BTech Aerospace Engineering or admission through the entrance examination in BTech Aerospace Engineering. This way can also be a good choice. But the above one I suggested may seem tough to you, but if you can work hard, then you will be able to work in the most prestigious institution in India.

To know more about the IIST, visit the link below:

https://www.careers360.com/university/indian-institute-of-space-science-and-technology-thiruvananthapuram

I hope this answer helps. All the very best for your future endeavors!