"Aeronautics (from the ancient Greek words \u1F70\u03AE\u03C1 \u0101\u0113r, which means \"air\", and \u03BD\u03B1\u03C5\u03C4\u03B9\u03BA\u03AE nautik\u0113 which means \"navigation\", i.e. \"navigation of the air\") is the science or art involved with the study, design, and manufacturing of air flight capable machines, and the techniques of operating aircraft and rockets within the atmosphere."@en . . . .