Aleksandr Serebrov

Aleksandr Aleksandrovich Serebrov (Russian: Алекса́ндр Алекса́ндрович Серебро́в, February 15, 1944 – November 12, 2013) was a Soviet cosmonaut. He graduated from Moscow Institute of Physics and Technology (1967), and was selected as a cosmonaut on December 1, 1978. He retired on May 10, 1995.
He flew on Soyuz T-7, Soyuz T-8, Soyuz TM-8 and Soyuz TM-17. He was one of very few cosmonauts to fly for both the Soviet Union and the Russian Federation that followed it. He held the record for most spacewalks, 10, until Anatoly Solovyev surpassed it. In all, Serebrov spent 371.95 days in space. Serebrov contributed to the design of Salyut 6, Salyut 7, and the Mir space stations.