Dear Ram Prakhash,

NITs don't offer Aerospace Engineering.

You can check the top colleges for Aerospace engineering below

Indian Institute of Technology Madras

Indian Institute of Technology Bombay

Indian Institute of Technology Kharagpur

Indian Institute of Technology, Kanpur

SRM University, Chennai

To check complete list you can refer below link

Percentage criteria is different from college to college. It's totally depends on in which college you are applying for.

Please mention the name of the college?

If you want to take admission in IITs you should have 75% marks in your board exam or you should be in top 20

JEE Advanced maximum are not defined

Maximum Marks vary every year like below:

 2017- 366

2016- 372

2015 - 504

2014 - 360

So, it is difficult to predict marks as exam pattern and marks change every year but you should score more than 50% marks to get good branch

Aerospace engineering is based on designing, building and testing aerocraft machines. It has 2 overlapping branches named aeronautical engineering and astronautical engineering. Also it includes inspecting malfunctions or damaged products to identify sources of problems and possible solutions.

You will learn to develop new technologies for use in aviation, defense

You can check the list of top colleges for aerospace engineering below

Government

Indian Institute of Technology Madras

Indian Institute of Technology Bombay

Indian Institute of Technology Kharagpur

Indian Institute of Technology, Kanpur

Private

SRM University, Chennai

Manipal Institute of Technology, Manipal

Amrita School of Engineering, Coimbatore

RV College of

Below are the IITs in which you can go to persue your aerospace engineering

Indian Institute of Technology Bombay

Indian Institute of Technology Madras

Indian Institute of Technology Kanpur

Indian Institute of Technology Kharagpur

JEE Advanced maximum are not defined

Maximum Marks vary every year like below:

2017- 366

2016-

You can consider below names -

School of Aeronautics

Indian Institute of Aircraft Engineering

Samalkha group of Institutions

Delhi Institute of Aeronautical Sciences

Satyug Darshan Technical Campus

Amity Institute of Space Science and Technology

Noida International University, School of Engineering & Technology

P.M. College of Engineering

JRN Institute of Aviation

iit bombey,madras,kanpur,karagpur is best iit where you can study aerospace engineering.

and no nit offered. see link:

https://engineering.careers360.com/articles/iits-cutoff-for-b-tech-aerospace-engineering

To get admission in various engineering colleges in Delhi/India you will have to clear engineering entrances like JEE MAINS, JEE Advanced etc. Aerospace Engineering course is not available in each and every college of engineering. Like aerospace engineering is not available in all NIT's so aim at clearing Jee Advanced