Owen Kay Garriott is an American electrical engineer and former NASA astronaut, who spent 60 days aboard the Skylab space station in 1973 during the Skylab 3 mission, and 10 days aboard Spacelab-1 on a Space Shuttle mission in 1983.

Edward George Gibson is a former NASA astronaut, pilot, engineer, and physicist. Before becoming a NASA astronaut, Gibson graduated from the University of Rochester and the California Institute of Technology. He became a research assistant in jet propulsion while completing his studies and eventually became a research scientist for Philco Corporation until joining NASA. Gibson was selected as an astronaut by NASA in 1965 as part of Astronaut Group 4, the first group of scientist-astronauts. He served on the support crew of Apollo 12 before moving on to work on the development of the Skylab space station. In 1973–74, Gibson made his first and only flight into space as science pilot aboard Skylab 4, the third and final manned flight to Skylab. He, along with Commander Gerald Carr and Pilot William Pogue, spent just over 84 days in space. Gibson resigned from NASA in December 1974, but returned in 1977 to preside over the selection of scientist-astronaut candidates. Gibson retired from NASA for the last time in October 1982.

Duane Edgar Graveline was an American physician and NASA astronaut. He was one of the six scientists selected in 1965, in NASA's fourth group of astronauts, for the Apollo program. He was best known for being immersed in water for seven days as part of his zero gravity deconditioning research while working as a United States Air Force (USAF) research scientist.

Joseph Peter Kerwin, M.D. is an American physician and former NASA astronaut, who served as Science Pilot for the Skylab 2 mission from May 25–June 22, 1973. He was the first physician to be selected for astronaut training.

Frank Curtis "Curt" Michel, Ph.D. was an American astrophysicist; a professor of astrophysics at Rice University in Houston, Texas; a former United States Air Force pilot; and a NASA astronaut.

Harrison Hagan "Jack" Schmitt is an American geologist, retired NASA astronaut, university professor, former U.S. senator from New Mexico, and the most recent living person to have walked on the Moon. As of 2018, he is also the last living crew member of Apollo 17.

Viktor Mikhailovich Afanasyev Russian: Виктор Михайлович Афанасьев; born 31 December 1948) is a colonel in the Russian Air Force and a test cosmonaut of the Yu. A. Gagarin Cosmonaut Training Center.

Aimbetov was selected to the first Kazakh cosmonaut class in 2002, along with Mukhtar Aimakhanov, out of a pool of 2,000 candidates. From 2003 to 2009, he trained in Russia as a cosmonaut at Star City. He returned to Astana, in Kazakhstan, after failing to secure a spaceflight. He had been scheduled to fly in autumn 2009, but due to the world financial crisis, this fell through. Aimakhanov remained in Russia, becoming a Russian citizen, making Aimbetov the sole Kazakhstani cosmonaut. In June 2015, he was selected to fly on the Soyuz TMA-18M mission in place of singer Sarah Brightman who had withdrawn in May 2015, and her backup, Satoshi Takamatsu, who had also withdrawn. The mission was projected to launch to the International Space Station on 1 September 2015.[4] Aimbetov becomes the third Kazakh-born cosmonaut to fly since Kazakhstan's independence in 1991, and the first to fly under the Kazakh flag, and as part of KazCosmos.

Aksyonov was selected as cosmonaut on 3 March 1973. He was awarded the title of the Hero of the Soviet Union on two occasions. He retired on 17 October 1988. Flew as Flight Engineer on Soyuz 22 and Soyuz T-2.

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.

Aleksandr Pavlovich Aleksandrov (Russian: Александр Павлович Александров; born February 20, 1943) is a former Soviet cosmonaut and twice Hero of the Soviet Union (November 23, 1983, and December 29, 1987). He was selected as cosmonaut on December 1, 1978. For his first spaceflight, he flew as Flight Engineer on Soyuz T-9, which lasted from June to November 1983. For his second spaceflight, he replaced one of the long-duration crew members of Mir EO-2. For the spaceflight, he was launched with the spacecraft Soyuz TM-3 in July 1987, and landed with the same spacecraft in December 1987. All together he spent 309 days, 18 hours, 2 minutes in space. He served as backup for Soyuz T-8, Soyuz T-13, and Soyuz T-15.

Anatoly Pavlovich Artsebarsky (Ukrainian: Анатолій Павлович Арцебарський) (Russian: Анатолий Павлович Арцебарский; born 9 September 1956) is a former Soviet cosmonaut. He became a cosmonaut in 1985. Artsebarsky has spent almost 5 months in space on a single spaceflight. In 1991, he flew aboard Soyuz TM-12 and docked with the Mir Space Station. Artsebarsky and Sergei Krikalev stayed aboard Mir while the rest of the crew flew back to Earth after eight days. Artsebarsky took six spacewalks during the Mir EO-9 mission. He spent over 33 hours walking in space.