Sergey Ryazansky
| Sergey Nikolayevich Ryazansky | |
|---|---|
| Born | November 13, 1974 | 
| Status | Retired | 
| Nationality | Russian | 
| Alma mater | Moscow State University (1996) | 
| Occupation | Biochemist | 
| Space career | |
| Roscosmos cosmonaut | |
| Time in space | 304 days 22 hours 21 minutes | 
| Selection | 2003 IMBP-6 Cosmonaut Group | 
| Total EVAs | 4 | 
| Total EVA time | 27 hours and 39 minutes | 
| Missions | Soyuz TMA-10M (Expedition 37/38), Soyuz MS-05, (Expedition 52/53) | 
| Mission insignia | |
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.