Hey it’s good to see that you have decided to take up engineering.
Aeronautical Engineering deals with the technology and sciences used for design manufacturing and maintenance of crafts, helicopters, space shuttles, commercial and military aircraft,spaceships and missiles .
the main aspect of aeronautical engineering is the structural navigational and the control systems aspect.
The basic eligibility criteria for BE / B.Tech program is class 12 Science (Physics, Chemistry and Maths) with a fairly high percentage of marks in the aggregate.
For admission to IIT you must pass the entrance examination IITJEE
For the M.Tech program in aeronautical engineering one should have completed degree in BE/BTech Aeronautical engineering or equivalent.