IIST - Indian Institute of Space Science and Technology Thiruvananthapuram Answered Questions

You may not get a seat for B.Tech. in aerospace engineering at the Indian Institute of Space Science and Technology, Thiruvananthapuram, with this rank.
This is because in previous years, the closing rank has been around 850 (general) and 324 for the OBC NCL category in aerospace engineering.
Due to the high number of candidates applying for this branch, the cut-off remains high as only 60 seats are available per batch.
However, you may have a chance to get admission in the Avionics Engineering branch. This estimate is based on previous-year data, and this year's results may differ.

It can't be decided on the basis of marks since marks vs rank statistics change every year depending on the level of difficulty.
If your JEE advanced rank is below 8000 then you surely get a seat .This year, rank fall down to 9500 I guess since lots of seats left vacant after final round and then they did spot round admission .
But on being safer side try to get below 8000. All the best for your exam

Good day, Umang Gajjar. The process for joining the engineering branch known as aeronautical engineering is identical to that of joining any other engineering branch. Procedure is unchanged. You must first determine the likely colleges where you plan to apply for admission. Then look at their eligibility requirements. Which entry test. If any minimal grade point averages for the 12th grade, etc. Once you are aware of everything, simply fill out the application for the relevant entrance exam, take it, do well on it, and be admitted. Just that. I wish you well.

Good day, Umang Gajjar. The link I've included below will provide you with all the details you need about the several colleges that offer courses in this area of engineering. To be admitted, you must register on your own. Of course, you must take their own entrance exam for institutions that are recognised to be universities. I'm confident you are aware of the requirements for institutions in Gujarat. https://www.shiksha.com/engineering/colleges/b-tech-in-aerospace-engineering-colleges-india
I wish you well.

IIST is much better. If you want to work in ISRO. IIST is the best place. Isro also takes students directly from iist. If you want to work as scientist in Institutes like Aries, iucaa etc. Both iisc and iist will give you equal chances. IIST have better facilities for research. But iisc has better name. Do Ph.D. from any one of them. You will become great space scientist.