Hii Debjit,

Hope you are doing good.

JEE Main and JEE Advanced entrance exams are conducted by Joint Seat Allocation Authority. ... The candidates qualifying for these exams can get admission in IITs, IIITs, and NITs to pursue Aerospace Engineering Course.

There are many institutions accepting JEE main scores for aerospace engineering:

It includes some of the best IITs.

For list of colleges refer to the link below:

https://www.google.com/url?sa=t&source=web&rct=j&url=https://engineering.careers360.com/colleges/list-of-be-btech-in-aerospace-engineering-colleges-in-india&ved=2ahUKEwjPm8L-74_0AhXiH7cAHaDwAwYQFnoECAQQBQ&usg=AOvVaw2mNhxylk1f0XpfbDypFRFa

Hopefully this will be helpful.

BEST wishes ahead.