In the US, space activity is controlled by the National Aeronautics and Space Administration better known by the acronym NASA. It is made up of a central organization and various administrative entities which manage the agency’s funding and priorities. There are also various centers that design or test equipment as well as space centers for launching rockets. There are also countless scientific committees that study and propose research to the mission selection committee, which allocates budgets to them.
The Jet propulsion laboratory (JPL) is one of NASA’s centers specializing in the production and operation of probes. It is located in Pasadena, California, north of Los Angeles. He has strong ties to the California University of Technology (Caltech). He is not involved in manned missions or launchers, but has expertise in planetary exploration. He is at the origin of all the rovers or landers having worked on the surface of Mars and of probes having flown over the 8 planets of our system. For these missions, the JPL manages the interplanetary communication network Deep space network (DSN) which is used for missions around the world.
The Ames research center (ARC) is a center located in Montain View south of San Francisco Bay in California. Originally dedicated to aeronautical research, this center has acquired experience in space. It now has a large number of test facilities such as high and low temperature wind tunnels, a Martian atmosphere simulator and cannons simulating the impacts of meteorites. Its position in the heart of the silicon valley allows it to be up to date on the on-board computing of probes and supercomputers. In the field of exploration, this center is greatly involved in the Pioneer solar system study program.