Space Environment Simulation Laboratory

The Space Environment Simulation Laboratory is a facility in Building 32 at the Lyndon B. Johnson Space Center that can perform large-scale simulations of the vacuum and thermal environments that would be encountered in space. Built in 1965, it was initially used to test Apollo Program spacecraft and equipment in a space environment. It consists of two human-rated chambers: A and B. Chamber A is equipped with a gaseous helium shroud capable of reaching temperatures of -439.9F and is currently being used to test the James Webb Space Telescope.