Aeronautics includes the sciences and techniques aimed at building and developing an aircraft in the Earth's atmosphere.

Aeronautical sciences include in particular aerodynamics, a branch of fluid mechanics; the techniques are those which relate to the construction of aircraft, their propulsion as well as the easements. The companies associated with these technologies are in the company category of the aeronautical sector.

Piloting an aircraft allows it to evolve and to practice an activity. The main activities are related to the air component of a country's armed forces, commercial air transport or the practice of a leisure activity or air sport. It involves organizations and airlines managing these activities.

An aircraft is a machine which, to move in the atmosphere, uses it for its sustenance. The main aircraft are the airplane and the helicopter. The armed forces also use missiles and drones, some of which are comparable to aircraft without a human pilot on board, in particular cruise missiles and observation drones.

These various activities can be classified as sports and leisure activities or economic and military activities.

• WikipediA: Aviation
• WikipediA: Aeronautics