Science

Hello,
So, you are confused between if you can go to the ISRO or any space science after BCA, then let me clarify you that you cannot go just after BCA. The reasons are following:
(1) Indian Space Research Organization is the only organization in India which conducts all its space program. To enter in ISRO, you must have at least M.Tech in Computer Science or Information Technology. ISRO does not hire the candidates who are only graduates. And if they do then it's a very rare case. So, no chance to get admission there.
(2) ISRO wants the candidates who are specialized with the branches like Aerospace, Aeronautics, Astronautics, Electronics, computer science & IT, Remote sensing & Navigation, Communication, etc. In BCA, you will just get the basic knowledge of Computer Application, BCA is not the stream of core specialization in computer science. So, no chance to go there.
(3) Although, in Space Science Organization, there are huge vacancies for computer science and IT students. But don't ever think to go there with only your graduation degree and no work experience. They do have a ton of weightage on your work experience in a particular field. Through BC, if you can't handle their ultra complex software and programming features. You cannot encrypt the data as they want. So, there are a lot of things which you cannot do with just BCA.
So, I suggest you to do MCA after that from one of the premier institutions and have a lot of experience in any space science or related field. This might help you go get admission in ISRO.
Kindly upvote the answer if you feel satisfied.
Ask any query at any time.
Good luck.