The United States Orbital Segment comprises the modules, solar arrays, and truss structures of the ISS built to NASA specifications. It includes contributions from European, Japanese, and Canadian space agencies, distinguishing it from the Russian Orbital Segment. The USOS provides the primary electrical power, life support, and laboratory space for the station's non-Russian crew members.
Heard on the job
The crew is moving hardware from the Russian segment over to the USOS for the upcoming biology experiment.