(This article is about a 1973 spaceflight. For the mission identified by NASA as ISS Soyuz 13, see Soyuz TMA-9.) Soyuz 13 (Russian: Союз 13, Union 13) was a 1973 Soviet manned space flight, the second test flight of the redesigned Soyuz 7K-T spacecraft that first flew as Soyuz 12. The spacecraft was specially modified to carry the Orion 2 Space Observatory. The flight, manned by Pyotr Klimuk and Valentin Lebedev, was the Soviet Union's first dedicated science mission, and was the first mission controlled by the new Kaliningrad Mission Control Center.