Hello Sandip,
Great choice of choosing aerospace engineering as a career. You will be having a great scope in future. The best colleges in Maharashtra for aerospace engineering are,
1. Indian Institute of Technology, Bombay
2. Indian Aerospace & Engineering Navi Mumbai, Maharashtra
3. Hindustan Aerospace & Engineering Pune, Maharashtra
4. Indian Institute for Aeronautical Engineering & Information Technology Pune, Maharashtra
5. Aeronautical Engineering and Research Organization Pune, Maharashtra

These were the best colleges in Maharashtra.
But I suggest that if opting such great career is you decision than you should definitely look for the best institute, I advise you Indian Institute of Space Science and Technology, Thiruvananthapuram.
It is the best one in country and is governed directly by Department of Space, Govt. of India.

Hope this helped you. Still any questions, Careers360 will always help.

Thank you,
All the best.

Best colleges for aerospace engineering in Maharashtra are as follows-

• IIT bombay
• Indian Institute for Aeronautical Engineering & Information Technology, pune
• Indian Aerospace & Engineering, navi Mumbai