Soyuz 30
Soyuz 30 lifts off en route to a brief visit with the crew of space station Salyut 6. This is the second manned Interkosmos mission, with cosmonaut Pyotr Klimuk and the first Polish cosmonaut, Mirosław Hermaszewski, aboard. They dock at Salyut 6 after two days in orbit, and spend a total of eight days in space. Though some joint experiments are conducted among the four occupants of the station, the Soyuz 30 crew frequently has to perform experiments in its own Soyuz vehicle to avoid getting in the station crew’s way, and the mission is kept short to free up the second docking port for a Progress unmanned supply vehicle launched four days after Soyuz 30 returns to Earth.