Aleksandrov was born in Omurtag, Bulgaria on December 1, 1951. He graduated from the Bulgarian Air Force Academy in 1974 and obtained a degree in technical sciences in 1983. In the Bulgarian Air Force, Aleksandrov rose to the rank of lieutenant colonel. On June 7, 1988, Aleksandrov launched aboard TM-5 as a Research Cosmonaut along with mission commander Anatoly Solovyev and Viktor Savinykh. Upon arriving at Mir, Aleksandrov became the first Bulgarian to reach a Soviet space station, as the Soyuz 33 mission carrying Georgi Ivanov failed to reach the Salyut 6 space station. On June 17, Aleksandrov returned aboard Soyuz TM-4 along with his fellow crew members. He, along with his crew-mates, spent just under 10 days in space.
Soyuz TM-4 was the fourth mission to Mir space station. The mission began on December 21, 1987, 11:18:03 UTC, launching Commander Vladimir Titov, Flight Engineer Musa Manarov and Research Cosmonaut Anatoli Levchenko into orbit. They docked with Mir two days later. During their stay there, crew carried out over 2000 various experiments, performed two EVAs. They were visited by Soyuz TM-5 and Soyuz TM-6 crews. Vladimir Levchenko spent only a week on the station, while other two members of the crew stayed for a long duration mission. They returned on a Soyuz TM-6 spacecraft, landing safely back on Earth on December 21, 1988, 09:57:00 UTC.Low Earth Orbit
Soyuz TM-5 was the fifth mission to Mir space station. The mission began on June 7, 1988, 14:03:13 UTC, launching Commander Anatoly Solovyev, Flight Engineer Viktor Savinykh and Research Cosmonaut Aleksandr Aleksandrov into orbit. They docked with Mir two days later, meeting with the long-duration resident crew. During their 7-day stay there, cosmonauts carried out scientific experiments. They returned on a Soyuz TM-4 spacecraft, landing safely back on Earth on June 17, 1988, 10:12:32 UTC.Low Earth Orbit
The Bulgarian Space Agency has put two Bulgarians onto the ISS in tandem with the Russian Space Agency. Their involvement in space began with the Interkosmos program that helped Communist Bloc countries get access to Soviet space technology. They contributed cosmonauts for a training class, two of which flew aboard the ISS.