In order to take admission in aerospace engineering you have to appear for the entrance exam like JEE (Main+Advanced), Amrita and SRM.
To know the top colleges you can refer below
Indian Institute of Technology, Kanpur
Indian Institute of Technology, Bombay
Indian Institute of Technology, Madras
Indian Institute of Technology, Kharagpur
Amity University
Amrita School of Engineering, Bangalore
SRM University
Indian Institute for Aeronautical Engineering & Information Technolgy
Good Luck!!
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