Aeronautical science is the science of flight, and this field relates to careers involved with the design and development of aircraft. Aeronautical engineers study how flight may be achieved within the earth's atmosphere and use that knowledge to pilot or design airplanes. Completing Aeronautical Engineering course is easy, but becoming an Aeronautical engineer is tough. This applies to all the engineering branches. If you have strong fascination towards science and if you learn the subject rather than just memorising, then you can definitely be one.