Aeronautics (from the ancient Greek words ὰήρ āēr, which means "air", and ναυτική nautikē which means "navigation", i.e. "navigation into 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. The British Royal Aeronautical Society identifies the aspects of "aeronautical Art, Science and Engineering" and "the profession of Aeronautics (which expression includes Astronautics)."
Astronautics (or cosmonautics) is the theory and practice of navigation beyond Earth's atmosphere.
Design is the creation of a plan or convention for the construction of an object, system or measurable human interaction (as in architectural blueprints, engineering drawings, business processes, circuit diagrams, and sewing patterns). Design has different connotations in different fields (see design disciplines below). In some cases, the direct construction of an object (as in pottery, engineering, management, coding, and graphic design) is also considered to use design thinking.
A vehicle (from Latin: vehiculum) is a machine that transports people or cargo. Typical vehicles include wagons, bicycles, motor vehicles (motorcycles, cars, trucks, buses), railed vehicles (trains, trams), watercraft (ships, boats), aircraft and spacecraft.
Disguise and complication are hindrances, both to good construction and good design, and as complication and disguise are expensive and wasteful... the interests of good art and true economy run on parallel lines.
Ernest Flagg, Small Houses: Their Economic Design and Construction (1922)
When I was born I drew in the common air, and fell upon the earth, which is of like nature, and the first voice which I uttered was crying, as all others do.
Wisdom of Solomon, vii. 3.
"Wal, I like flyin' well enough,"
He said, "but the' ain't sich a thundern' sight
O' fun in't when ye come to light."
John Townsend Trowbridge, Darius Green and his Flying Machine (1867).