In June 2009, he was one of nine astronaut candidates selected by NASA out of 3500 applications and began training as part of NASA Astronaut Group 20. The nine Americans, as well as two Canadian Space Agency candidates and three JAXA candidates, started training at the Johnson Space Center in August 2009.[9] The 14 candidates carried trained in various different fields including T-38 flight training, Extravehicular activity training, survival, International Space Station operations and other various skills. The group completed their training and Lindgren and his 13 classmates became eligible for future flight assignments on November 4, 2011.
From June 18 to 27, 2017 Lindgren was commander of the NEEMO 22 mission to the Aquarius Reef Base, located 19 meters underwater off the coast of Florida. The NEEMO 22 mission focused on both exploration spacewalks and objectives related to the International Space Station and deep space missions. As an analogue for future planetary science concepts and strategies, the mission's crew also performed marine science under the guidance of Florida International University's marine science department. Objectives for the crew also included testing spaceflight countermeasure equipment, technology for precisely tracking equipment in habitat and studies of body composition and sleep. The crew also assessed hardware sponsored by ESA that will help crew members evacuate someone who has been injured on a future lunar spacewalk.
Expedition 44/45
In 2013, he began training at the Gagarin Space Center and was assigned as backup flight engineer for Expedition 42/43 which launched on Soyuz TMA-15M.[10] He was later assigned to Expedition 44/45 as a flight engineer. On July 22, 2015, Lindgren launched on his first mission to the ISS alongside Russian cosmonaut Oleg Kononenko and Japanese astronaut Kimiya Yui onboard Soyuz TMA-17M.[8] Six hours later the trio docked to the ISS, officially joining Expedition 44 alongside Soyuz TMA-16M crewmembers Gennady Padalka and Mikhail Kornienko of Roscosmos and Scott Kelly of NASA. In November 2015, while on the ISS, Kjell played a set of bagpipes manufactured by McCallum Bagpipes Ltd as a memorial to Victor Hurst, who died in October of that year. McCallum Bagpipes was chosen to manufacture the bagpipes because they make them in plastic, which is easily sanitized and transported, ideal for space exploration. This is thought to be the first time the Great Highland bagpipes have been played in space.[11]
Lindgren (left) alongside crewmates Oleg Kononenko and Kimya Yui (right).
Towards the end of Expedition 44, Soyuz TMA-18M docked with the ISS carrying Russian cosmonaut Sergey Volkov, ESA astronaut Andreas Mogensen and KazCosmos cosmonaut Aidyn Aimbetov. This was unusual as it occurred before the departure of Soyuz TMA-16M, meaning there was a small period where nine people were on board the ISS. This was done in order to allow Kelly and Kornienko to remain on board the ISS for a full year, Soyuz TMA-16M landed with Paldlka, Mogensen and Aimbetov nine days after the launch of Soyuz TMA-18M, returning the ISS to normal six crew operations.[12][13]
On October 28, 2015, Lindgren ventured outside of the ISS with Scott Kelly for his first spacewalk, the two spacewalkers completed several tasks including changing an insulating unit on one of the station's Main Bus Switching Units (MBSU), carried out some maintenance on one of Canadarm-2's Latching End Effector's and prepared both of the station's "open" Pressurized Mating Adapters ahead of the installation of two International Docking Adapters.[14] On November 6, 2015, Lindgren ventured outside the station with Kelly again for his second spacewalk. Over the course of the 7 hour and 48-minute spacewalk, the two astronauts worked to restore a portion of the ISS's cooling system to its primary configuration, returning ammonia coolant levels to normal in the primary and backup radiator arrays.[15]
On December 11, 2015, he returned to Earth alongside Kononenko and Yui following 141 days in space, the Soyuz touched down on the Kazakh Steppe at night, which is rare for the Soyuz. Following landing, Lindgren and Yui returned to the Johnson Space Center in Houston to rendezvous with their families.[16][17]
In February 2021, he was assigned as commander of SpaceX Crew-4, which was his second long-duration mission to the ISS. He flew alongside NASA astronaut Bob Hines, who was assigned as pilot.[21] They were joined by mission specialists Samantha Cristoforetti of ESA and Jessica Watkins of NASA.[22][23] Crew-4 launched on April 27, 2022, and docked later that day.[24][25] It splashed down off the coast of Florida with Lindgren on board on October 14, 2022, after 170 days in orbit.[26]
Lindgren is married to Kristiana Lindgren and has three children. He has said that he enjoys running, SCUBA diving, reading, movies, photography, amateur astronomy, working with computers, and church activities.[8][27]
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