Hello,

I will start with Data Science first. So basically Data science is an interdisciplinary field about scientific methods, processes and systems to extract knowledge from data.

Whereas AI is something that enables machines to mimic human intelligence using logics, ML, DL,etc.

And ML is the study of computer algorithms that improve automatically through experience and by the use of data.

So basically we can say that machine learning is the link that connects Data Science and AI because AI is the tool that helps data science get results and solutions for specific problems and ML is what helps in achieving that goal.

Now talking about jobs in all of these specific field of study, since all of these are going to be the future of human life so jobs are everywhere in huge demand in all of these fields ISRO specifically(since you mentioned). There are various projects that has already been done using AI , ML and Data Science. Like ISRO launched Chandrayaan 2 spacecraft which had AI tools and frameworks, uses solar energy for its functioning and can communicate only with the Lander. ISRO first developed Target identification using machine learning algorithms from MOTR radar data.

Hope this is resourceful to you.

All the best!!!