Suggested Searches

4 min read

NASA Astronaut, Crewmates Return to Earth After 197-Day Mission in Space

Expedition 57 crew members Sergey Prokopyev of Roscosmos, Serena Auñón-Chancellor of NASA, and Alexander Gerst of ESA
Expedition 57 crew members Sergey Prokopyev of the Russian space agency Roscosmos, Serena Auñón-Chancellor of NASA, and Alexander Gerst of ESA (European Space Agency) emerge one at a time from the Soyuz MS-09 that carried them home from the International Space Station Dec. 20, 2018, after a 197-day mission. The spacecraft touched down in Kazakhstan at 12:02 a.m. EST, marking the end of a voyage that took them around the globe 3,152 times, covering 83.3 million miles. Credits: NASA Television

Three members of the International Space Station’s Expedition 57 crew, including NASA astronaut Serena Auñón-Chancellor, returned to Earth Thursday, safely landing at 12:02 a.m. EST (11:02 a.m. local time) in Kazakhstan.

Auñón-Chancellor and her crewmates, Expedition 57 Commander Alexander Gerst of ESA (European Space Agency) and Soyuz Commander Sergey Prokopyev, launched June 6 and arrived at the space station two days later to begin their mission. Over 197 days, they circled the globe 3,152 times, covering 83.3 million miles.

For the last 16 days of her mission, Auñón-Chancellor was joined by fellow NASA astronaut Anne McClain, marking the first time in which the only two U.S. astronauts on a mission both were women.

Serena Auñón-Chancellor of NASA after landing on Dec. 20, 2018.
Serena Auñón-Chancellor of NASA rests in a chair after she, Alexander Gerst of ESA (European Space Agency), and Sergey Prokopyev of the Russian space agency Roscosmo, landed in their Soyuz MS-09 capsule in a remote area near the town of Zhezkazgan, Kazakhstan on Dec. 20, 2018. Auñón-Chancellor, Gerst, and Prokopyev are returning after 197 days in space where they served as members of the Expedition 56 and 57 crews onboard the International Space Station. Credits: NASA/Bill Ingalls

The Expedition 57 crew contributed to hundreds of experiments in biology, biotechnology, physical science and Earth science aboard the world-class orbiting laboratory. Highlights included investigations into new cancer treatment methods and algae growth in space. The crew also installed a new Life Sciences Glovebox, a sealed work area for life science and technology investigations that can accommodate two astronauts.

This was the first flight for Auñón-Chancellor and Prokopyev and the second for Gerst, who – with a total of 362 days in orbit – now holds the flight duration record among ESA astronauts.

Prokopyev completed two spacewalks totaling 15 hours and 31 minutes. During a 7 hour, 45 minute spacewalk Dec. 11, he and Oleg Kononenko of Roscosmos retrieved patch samples and took digital images of a repair made to the habitation module of the Soyuz MS-09 in which the Expedition 57 trio rode home. The space station crew located and, within hours of its detection, repaired a small hole inside the Soyuz in August. The spacecraft was thoroughly checked and deemed safe for return to Earth.

When the Soyuz undocked at 8:40 p.m. Dec. 19, Expedition 58 began aboard the station, with McClain, David Saint-Jacques of the Canadian Space Agency, and Kononenko comprising a three-person crew. The next residents on the space station – Nick Hague and Christina Koch of NASA and Alexey Ovchinin of Roscosmos – will launch Feb. 28 from the Baikonur Cosmodrome in Kazakhstan to join their crewmates, marking the start of Expedition 59.

For more than 18 years, humans have lived and worked continuously aboard the station, advancing scientific knowledge and demonstrating new technologies, making research breakthroughs not possible on Earth that will enable long-duration human and robotic exploration into deep space. A global endeavor, more than 230 people from 18 countries have visited the unique microgravity laboratory that has hosted more than 2,400 research investigations from researchers in more than 103 countries.

Keep up with the International Space Station, its research and crews at:

Get breaking news, images and features from the station on Instagram and Twitter at:



Stephanie Schierholz
Headquarters, Washington
Gary Jordan
Johnson Space Center, Houston