English: A mock-up of the USSR Soyuz spacecraft on display at the Cosmonaut Training Center (Star City) near Moscow. The Soyuz, mounted horizontally, was exhibited at the Paris air show in May- June 1973 in a docked configuration with an Apollo spacecraft. The spherical-shaped section of the Soyuz is called the orbital module. The middle section with the lettering "CCCP" (USSR) on it is called the descent vehicle. Two solar panels extend out from the instrument-assembly module. The joint US-USSR Apollo-Soyuz Test Project docking in Earth orbit mission took place in July 1975. A docking module mock-up is atop the Soyuz training mock-up on the left.