A year in space

Updated 2:40 PM ET, Fri April 24, 2015
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NASA astronaut Scott Kelly watches fresh carrots float in front of him on the International Space Station on Sunday, April 19. Scott is taking part in a one-year mission to test how the human body reacts to an extended time in space. NASA
The northern lights are visible from the International Space Station on Saturday, April 18. NASA
Kelly posted this image of himself and Samantha Cristoforetti after the successful capture of the SpaceX Dragon spacecraft with the space station's robotic arm on April 17. The SpaceX Dragon brought cargo to support the science and research missions. Scott Kelly/NASA
A Soyuz TMA-16M spacecraft approaches the International Space Station on March 27. The spacecraft was carrying Kelly and Russian cosmonauts Gennady Padalka and Mikhail Kornienko. Kelly and Kornienko will spend a year in space. Padalka will stay for six months. NASA
The Soyuz TMA-16M spacecraft launches from the Baikonur Cosmodrome in Kazakhstan on March 27. Bill Ingalls/NASA/Getty Images
Kelly gives the thumbs-up before launch on March 27. MAXIM ZMEYEV/Reuters/LANDOV
Kornienko tests his spacesuit as Kelly and Padalka wait their turn on March 27. KIRILL KUDRYAVTSEV/AFP/Getty Images
From left, Kelly, Padalka and Kornienko pose after a news conference at the Baikonur Cosmodrome on Thursday, March 26. KIRILL KUDRYAVTSEV/AFP/Getty Images
The spacecraft is raised into the vertical position shortly after arriving on the launch pad Wednesday, March 25. Bill Ingalls/NASA/Getty Images
Padalka gets his hair cut in the Cosmonaut Hotel in Baikonur, Kazakhstan, on March 25. Bill Ingalls/NASA/Getty Images
Security personnel stand guard as the Soyuz spacecraft is rolled out by train to the launch pad on March 25. The mission is a first for NASA, but not for Russia. Between 1987 and 1995, four cosmonauts spent a year or more in space. Bill Ingalls/NASA
The Soyuz spacecraft is seen during its journey to the launch pad on March 25. Bill Ingalls/NASA
The crew and backup crew members talk to officials before their final check of the spacecraft on Monday, March 23. Bill Ingalls/NASA/Getty Images
Kelly climbs the stairs to enter the spacecraft during the final check on March 23. Bill Ingalls/NASA/Getty Images
The spacecraft is seen on Friday, March 20, after being lowered into position for encapsulation. Bill Ingalls/NASA/Getty Images
Kelly plays pool with Kornienko at the Cosmonaut Hotel on Thursday, March 19. Bill Ingalls/NASA/AP
Kelly is seen inside a Soyuz simulator at the Gagarin Cosmonaut Training Center in Star City, Russia, on Thursday, March 5. Bill Ingalls/NASA/Getty Images
Kelly and his twin brother, retired astronaut Mark Kelly, speak to media outlets about the one-year mission on January 19. Mark Kelly has volunteered for NASA's "Twins Study" to see how the identical twins change over the year in two very different environments. Robert Markowitz/NASA