Aeronautical engineering is a branch of aerospace engineering mainly concerned with aircraft design and general aviation. The field of aeronautical engineering deals with aspects such as the design, manufacture, and testing of aircraft.
Since aeronautical engineering is concerned with the design and development of aircraft, it includes topics such as civil aviation, military aviation, air transport, aerodynamics and bird flight. For students interested in these topics, aeronautical engineering could be a good subject.
However, this field is very competitive and very few students take this course nowadays. Yet, if you do well in it there are a number of career opportunities for aeronautical engineers that will make for a very happy and successful career path.