Salyut 6 expanded
Launched unmanned in April, the Kosmos 1267 space station module docks automatically with the recently vacated Salyut 6 space station – the first-ever on-orbit expansion of a previously launched space structure. The module, a hardware holdover from the abandoned Almaz military space station program, provides engineers on the ground with information needed to safely add modules to the upcoming Salyut 7 space station to expand its habitable space. The experience gained will also be instrumental in the construction of the Mir station and the International Space Station. Kosmos 1267 remains docked to Salyut 6 until the combined structure tumbles out of orbit in 1982.