Hello Aspirant,

Hope you are doing well.

Yes you can be an Astrophysicist after completing B-Tech in Electronics and Communication Engineering.

To become an Astrophysicist first you need to qualify Gate exam with a good score and join a integrated course at many research institution in india like: IISC, IISER, IUCAA etc.

Also you can do direct Phd in Astrophysics after B-Tech in Electronics and Communication Engineering.

Hope this information helps you.

Best Wishes!