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A Russian-owned and -built module of the International Space Station (ISS), the third component to arrive. It was launched by a Russian Proton rocket in July 2000. Zvezda is similar in layout to the core section of Russia's earlier Mir space station. It is a stepped cylinder 13.1 m long and has two solar arrays with a wingspan of 29.7 m. Zvezda contains three pressurized compartments: a small, spherical Transfer Compartment at the forward end; the long, cylindrical main Work Compartment; and the small, cylindrical Transfer Compartment at the aft end. Spacewalks can be performed by using the Transfer Compartment as an airlock. Zvezda provided the early station living quarters, and will become the centre of the Russian segment of the ISS as further US and international sections are added.

Subjects: Astronomy and Astrophysics.

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