Dear Divya

Basically, It depends on your performance in JEE and also the colleges too. If you are planning to get into IIT, you need to clear JEE and then you can persue Aeronautical Engineering. If you can mention where you want +2 colleges, we will definitely help. You can also find the top colleges in India which are providing Aeronautical Engineering Course:

• Indian Institute of Technology Bombay (IIT Bombay)
• Indian Institute of Technology Kanpur (IIT Kanpur)
• PEC University of Technology
• Indian Institute of Technology Madras (IIT Madras)

All the best.

You can go to any school in 11th and 12th class. To become a Astronaut bachelor's degree is required.

According, to the NASA at least three years of related professional experience obtained after degree completion OR at least 1,000 hours pilot-in-command time on jet aircraft. The ability to pass the NASA long-duration astronaut physical. Distant and near visual acuity must be correctable to 20/20 for each eye. The use of glasses is acceptable.

You can check the top colleges below for Aeronautical Engineering

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

https://engineering.careers360.com/colleges/list-of-engineering-colleges-in-India?f[0]=sm_college_course_level%3AUG&f[1]=sm_college_degree%3AB.E%20/Btech&f[2]=sm_course_offered%3AAeronautical%20Engineering

Good Luck!!