


During his time in orbit, cosmonaut Tuan performed experiments on melting of mineral samples in microgravity and plant experiments on azolla. Tuan also photographed Vietnam from orbit for the purpose of mapping.
In April, 1979, two Vietnamese 'guest cosmonaut' trainees selected were for Salyut 6 missions: Pham Tuan and Bui Thanh Liem. They were among trainees from Romania, Mongolia, Cuba, Hungary, Poland, East Germany, Czechoslovakia and Bulgaria.
Back ground photo by Popov and Rumyin is of a Soyuz T2 spacecraft. Source TASS.