In order to become a aeronautical engineer you have to appear for the entrance exam of engineering like JEE (Main+Advanced), your state level entrance exam and private level entrance exam like BITSAT, SRM, VIT Amrita and Manipal.

You can also check the top colleges for aeronautical engineering below

Manipal Institute of Technology, Manipal

PEC University of Technology, Chandigarh

Anna University, Chennai

Indian Institute of Space Science and Technology, Thiruvananthapuram

Sathyabama University, Chennai

To check the complete list you can refer below link

Top Aeronautical Engineering Colleges

Good Luck!!