Soyuz T-15 was the last mission to visit the Salyut 7 space station and the first to visit the Mir space station. The mission began on March 13, 1986, 12:33:09 UTC, launching Commander Leonid Kizim and Flight Engineer Volodimir Solovyov into orbit. They docked with Mir two days later. During their stay there, crew tested station's systems and were visited by two Progress cargo spacecrafts. On May 5, 1986, 12:12:09 UTC crew undocked from Mir and docked with Salyut the next day. There they collected experiments results, instruments and performed two EVAs. On June 25 crew undocked from Salyut 7 and returned to Mir the next day. The mission concluded with a safe landing back on Earth on July 16, 1986, 12:34:05 UTC.
The Soyuz-U2 was a Soviet, later Russian, carrier rocket. It was derived from the Soyuz-U, and a member of the R-7 family of rockets. It featured increased performance compared with the baseline Soyuz-U, due to the use of syntin propellant, as opposed to RP-1 paraffin, used on the Soyuz-U.
Soyuz T-15 was a Soyuz spacecraft which launched on 13 March 1986 12:33 UTC. It transported two cosmonauts to Salyut 7 and Mir. The crew was Leonid Kizim and Vladimir Solovyov.Soyuz Details
The Soviet space program, was the national space program of the Union of Soviet Socialist Republics (USSR) actived from 1930s until disintegration of the Soviet Union in 1991. The Soviet Union's space program was mainly based on the cosmonautic exploration of space and the development of the expandable launch vehicles, which had been split between many design bureaus competing against each other. Over its 60-years of history, the Russian program was responsible for a number of pioneering feats and accomplishments in the human space flight, including the first intercontinental ballistic missile (R-7), first satellite (Sputnik 1), first animal in Earth orbit (the dog Laika on Sputnik 2), first human in space and Earth orbit (cosmonaut Yuri Gagarin on Vostok 1), first woman in space and Earth orbit (cosmonaut Valentina Tereshkova on Vostok 6), first spacewalk (cosmonaut Alexei Leonov on Voskhod 2), first Moon impact (Luna 2), first image of the far side of the Moon (Luna 3) and unmanned lunar soft landing (Luna 9), first space rover (Lunokhod 1), first sample of lunar soil automatically extracted and brought to Earth (Luna 16), and first space station (Salyut 1). Further notable records included the first interplanetary probes: Venera 1 and Mars 1 to fly by Venus and Mars, respectively, Venera 3 and Mars 2 to impact the respective planet surface, and Venera 7 and Mars 3 to make soft landings on these planets.WIKI