Ilan Ramon (born June 20, 1954 – February 1, 2003) was an Israeli fighter pilot and later the first Israeli astronaut for NASA. Ramon was the space shuttle payload specialist of STS-107, the fatal mission of Columbia, in which he and six other crew members were killed in the re-entry accident. At 48, he was the oldest member of the crew. Ramon is the only foreign recipient of the United States Congressional Space Medal of Honor, which he was awarded posthumously.

Thomas Arthur Reiter (born 23 May 1958 in Frankfurt, West Germany) is a retired European astronaut and is a Brigadier General in the German Air Force currently working as ESA Interagency Coordinator and Advisor to the Director General at the European Space Agency (ESA). He was one of the top 25 astronauts in terms of total time in space. With his wife and two sons he lives near Oldenburg in Lower Saxony.

Vladimír Remek (born 26 September 1948) is a Czech politician and diplomat as well as a former cosmonaut and military pilot. He flew aboard Soyuz 28 from 2 to 10 March 1978, becoming the first Czechoslovak in space and the only Czech in space. As the first cosmonaut from a country other than the Soviet Union or the United States, and with the entry of the Czech Republic into the European Union, Remek is considered to be the first astronaut from the European Union.

Sergei Nikolayevich Revin (born January 12, 1966 in Moscow) is a Russian cosmonaut that was selected in 1996, and completed spaceflight training in 1998. He served as a crew member aboard the International Space Station, having launched on his first spaceflight on 15 May 2012 and returned on 17 September 2012.

Roman Yurievich Romanenko (Major, Russian Air Force; Russian: Роман Юрьевич Романенко; born August 9, 1971) is a retired cosmonaut at the Yuri Gagarin Cosmonaut Training Center. Romanenko was selected as a cosmonaut candidate at the Gagarin Cosmonaut Training Center Cosmonaut Office in December 1997. From January 1998 to November 1999 he undertook his basic training course. In November 1999 he was qualified as a Test Cosmonaut. He served as the backup to Oleg Kotov as the Commander of Soyuz TMA-10 and Fyodor Yurchikhin as Commander of Expedition 15.

Yury Viktorovich Romanenko (Russian: Ю́рий Ви́кторович Романе́нко, Jurij Viktorovič Romanenko; born August 1, 1944) is a former Soviet cosmonaut, twice Hero of the Soviet Union (March 16, 1978 and September 26, 1980). Over his career, Yury Romanenko spent a total of 430 days 20 hours 21 minutes 30 seconds in space and 18 hours in space walks. In 1987 he was a resident of the Mir space station, launching on Soyuz TM-2 and landing aboard Soyuz TM-3. He remained on Mir for 326 days that was the longest stay in space at that time. His son, Roman Romanenko is also a cosmonaut, and has become the third second-generation space traveler on Soyuz TMA-15 in May 2009.

Valery Ilyich Rozhdestvensky (Russian: Валерий Ильич Рождественский, 13 February 1939 – 31 August 2011) was a Soviet cosmonaut. Rozhdestvensky was selected as a cosmonaut on 23 October 1965 and flew as Flight Engineer on Soyuz 23. After his space flight he continued to work with the space program at the Yuri Gagarin Cosmonaut Training Center.

Sergey Nikolayevich Ryazansky (Russian: Серге́й Николаевич Рязанский; born November 13, 1974) is a Russian cosmonaut. He was selected as commander of the IMBP-6 cosmonaut group in 2003, but later transferred to the TsPK Cosmonaut Group. Ryazansky made his first spaceflight aboard the Soyuz TMA-10M/Expedition 37/Expedition 38 mission from September 2013 until March 2014. In 2017, Ryazansky returned to space was the commander of Soyuz MS-05, and served as Flight Engineer for Expedition 52 / 53. Ryazansky was selected as a research and test cosmonaut in 2003. He completed training in 2005. In 2009 he participated in a 105-day mission as part of phase two of the Mars 500 program.

Valery Victorovich Ryumin (born August 16, 1939 in Komsomolsk-on-Amur) is a former Soviet cosmonaut. In 1973, he joined the RSC Energia cosmonaut corps. A veteran of three space flights, Ryumin has logged a total of 362 days in space. In 1977, he spent 2 days aboard Soyuz-25, in 1979, he spent 175 days aboard Soyuz vehicles and the Salyut-6 space station, and in 1980, he spent 185 days aboard Soyuz vehicles and the Salyut-6 space station. In January 1998, NASA announced Ryumin's selection to the crew of STS-91. Ryumin served aboard STS-91 Discovery (June 2–12, 1998) the 9th and final Shuttle-Mir docking mission, concluding the joint U.S./Russian Phase I Program. The STS-91 mission was accomplished in 154 Earth orbits, traveling 3.8 million miles in 235 hours and 54 seconds.

Aleksandr Mikhailovich Samokutyayev (Александр Михайлович Самокутяев – born 13 March 1970 in Penza / Penza Oblast / Russian SFSR) is a former Russian cosmonaut. Samokutyayev served as a Flight Engineer for the International Space Station (ISS) long duration Expedition 27/28 missions. He also served as the Soyuz TMA-21 commander. He most recently served on the Soyuz TMA-14M Expedition 41/42 crew aboard the ISS. He was hired as a cosmonaut in the summer of 2003.

Gennadi Vasiliyevich Sarafanov ( b. January 1, 1942 in Sinenkiye, Saratov Oblast, Russia – d. September 29, 2005, Moscow) was a Soviet cosmonaut who flew on the Soyuz 15 spaceflight in 1974. This mission was intended to dock with the space station Salyut 3, but failed to do so after the docking system malfunctioned.

Sultan bin Salman bin Abdulaziz Al Saud (born 27 June 1956) is a former Royal Saudi Air Force pilot who flew aboard the American STS-51-G Space Shuttle mission as a payload specialist, and a member of the House of Saud. He is thus the first member of a royal family to be an astronaut, and the first Arab and Muslim to fly in space.