Hi,

Astronomy / Astrophysics can be pursued in diploma, UG and even PG level. The minimum criteria to pursue it in UG level is that you must have passed class 12th in Science with 50%-60% minimum aggregate.

Now, you can also pursue astronomy/astrophysics after your Bachelors in engineering. An engineer with an aptitude for Astronomy and Astrophysics, can also enter the field as a research scholar.

Also, if you are interested to pursue it in any of the IITs, you might be happy to know, IIT Indore does provide both Astronomy and Astrophysics.

Therefore, you can go for IIT Coaching if you're interested in Astrophysics or Astronomy.

Hope this was helpful.