astronaut, Astronauts rehearse for shuttle launch, Astronaut Maneuvering Research Vehicle, Astronauts Install Space Station Cameras, astronautical and aeronautical materials, Astronaut Operations Requirement Document, Astronautic Corrugated Metal Pipe Factory, Astronautical Defensive-Offensive System, Astronauts work in weightless conditions., Astronautical Research and Development Agency, Astronauts have special breathing apparatus.