Which term encompasses both aeronautics and space?

The term that encompasses both aeronautics and space is "aerospace." Aerospace refers to the broad industry and field of science that includes the development and study of technologies for vehicles and systems that operate both in the Earth's atmosphere (aeronautics) and in outer space. The term reflects the interconnected nature of these two domains, as advancements in aeronautics often contribute to innovations in space technology, and vice versa.

While "aero" might refer to air-related technologies or concepts, it does not inherently include space. Similarly, "airfoil" and "airplane" are specific terms that pertain to aeronautics and do not cover the space aspect at all. Thus, "aerospace" is the most comprehensive term that effectively captures the relationship and synergy between aerial and space-related professionals and technologies.