RasslinGod said:
tinorman, u and i seem to have similar goals. I am too am wondering hwo to get there but not do aerospace engineering. for some reason i like physics the most and hoep to apply it somehow...somehow...what kind of skills can a physicst bring? Calculating trajectories? Maybe materials physics to help build the craft. But what else??
Because it's what I know best, I'll focus on NASA. Keep in mind that the space industry encompasses many other countries' space programs (RSA, ESA, JAXA, CSA, CSNA, etc.) as well as private companies that also hire physicists.
NASA is currently broken up into four mission directorates: Aeronautics Research, Exploration Systems, Science, and Space Operations, all of which need physicists. Since we're limiting this discussion to space exploration, I'll only talk about the latter three.
The goal of the Exploration Systems Mission Directorate is to carry out the Vision for Space Exploration with human and robotic missions. The creation of the robots and the transportation of both humans and robots (launch vehicle, cargo, landing, development of lunar infrastructure, etc.) all need existing and new technologies that physicists work to design and create with engineers.
It may seem like all space exploration falls under the directorate I just described, but without the Science Directorate, there would be no fundamental need for robotic and human exploration. Scientists define the goals of the mission, design the experiments and detectors, gather the data, process and analyze the data, and make discoveries which allow the public to understand why a national space organization is important. Physicists represent a large number of scientists in this directorate.
The Space Operations Directorate is charged with running the space shuttle, the International Space Station, and flight support. This is where your example of calculating and tracking trajectories comes in, as well as monitoring thousands of systems on the space vehicles during operation, during launch and landing, during rendezvous and docking, ensuring space communications, and transitioning current hardware and systems to the new launch vehicle. I believe astronaut training also falls under this directorate. Technically trained specialists of all kinds, including physicists, are needed for these activities.
What I've just described is a broad overview; I've definitely neglected to mention many other jobs within space exploration at NASA in which physicists take part. I recently met a highly successful manager of a military research facility who told me that his physics training allowed him to do a broad range of jobs throughout his career. He said he usually didn't have the job title "physicist," but he always considered himself one. The same is true here: Most of these positions are not specifically for physicists, but physicists could and do get hired to do them.