I find sandip university, Priyadarshinin College of engineering, IIAEIT, Shri Annasaheb Dange College of Engineering and Technology, GGIAET, Sastri Group of Institutes offering aerospace engineering. Which is the best - well I dont know. After B.Tech M.Tech can be done at DAIT which is one of the best for aerospace engineering but very tough to get into. 

There are very few decent colleges accepting niche Specialization like Aeronautical except IIT Bombay.

However, Priyadarshini college of Engineering by Nagpur University(AICTE approved) is recommended and ranks AA established in 1990.
The college accepts MHCET and cutoff stands at ranks below 54,000 on average.
Placements are observed in core branches as well and IT companies too.
It has seen good opportunities into Aeronautical sector with an average of 3.5Lpa salary and 80 percent ratio of Placement.

For full reviews posted by students check below.

https://engineering.careers360.com/priyadarshini-college-engineering-nagpur/reviews


To get more information on other colleges accepting Aeronautical Engineering in Maharashtra are shared below.

https://engineering.careers360.com/colleges/list-of-aeronautical-engineering-colleges-in-maharashtra