Aerospace Engineers design, build, test, improve, and study any type of aircraft, which may be a rocket, spaceship, airplane, jet aircraft, or satellite.
For example, I used to work for the NASA Dryden Flight Research Center. At this center, scientists and engineers build designs that improve the performance of aircraft such as F-15 and F-18 fighter jets. My project was called the Intelligent Flight Contol Systems (IFCS) and its main purpose was to place an intelligent computer in the aircraft which allowed it to detect failures in its wings or flight status and to correct itself by adjusting its wings. It was state of the art work.
I also saw the Space Shuttle Land at Edwards California and that was amazing.
Aerospace engineers can be involved in many exciting projects such as building the next rocket to go to Mars, which is what Space Exploration Technologies (Space X) is doing in Hawthorne California. Aerospace engineers can also be involved in the design of a Mars rover such as the one that was designed by the JPL engineers.
The possibilites are endless for Aerospace Engineers. Aerospace engineers are the pioneers of the new century. Venturing where no man has gone before.