How quickly does aerospace engineering advance?

Aerospace engineering is the primary field of engineering concerned with the development of aircraft and spacecraft.[3] It is divided into two major and overlapping branches: aeronautical engineering and astronautical engineering.

Aeronautical engineering was the original term for the field. As flight technology advanced to include craft operating in outer space, the broader term "aerospace engineering" has largely replaced it in common usage.[4] Aerospace engineering, particularly the astronautics branch, is often colloquially referred to as "rocket science".[5]

Aerospace engineers design primarily aircraft, spacecraft, satellites, and missiles. In addition, they test prototypes to make sure that they function according to design.
Work Environment
Aerospace engineers are employed in industries whose workers design or build aircraft, missiles, systems for national defense, or spacecraft. Aerospace engineers are employed primarily in manufacturing, analysis and design, research and development, and the federal government.
How to Become an Aerospace Engineer
Aerospace engineers must have a bachelor’s degree in aerospace engineering or another field of engineering or science related to aerospace systems. Aerospace engineers that work on projects that are related to national defense may need a security clearance.
Job Outlook
Employment of aerospace engineers is projected to decline 2 percent from 2014 to 2024. Aircraft are being redesigned to cut down on noise pollution and to raise fuel efficiency, which will help sustain demand for research and development.