Kvant-1: Mir expands

The Soviet Union launches the first Kvant module to join with the Mir core module. An expansion originally devised for the Salyut 7 space station, Kvant provides additional working space and life support systems aboard Mir as, well as a gyroscopic stablization system to keep the station properly oriented without the constant use of engines and fuel. Years later, the basic Kvant design will be developed further in Russia’s contributions to the International Space Station.