NASA
Sunlight glints off the International Space Station with the blue limb of Earth providing a dramatic backdrop in this photo taken by an astronaut on the shuttle Endeavour just before it docked after midnight on Feb. 10, 2010 during the STS-130 mission.
By Managing editor
updated 11/26/2012 12:14:54 PM ET 2012-11-26T17:14:54

A veteran NASA space commander and Russian cosmonaut have signed on for the ultimate space voyage: a yearlong trip on the International Space Station.

American astronaut Scott Kelly and Russian cosmonaut Mikhail Kornienko will launch on the one-year space station flight in spring 2015 and return to Earth in spring 2016, NASA officials announced Monday. They will begin their mission training in early 2013.

The mission will help NASA understand how the human body adapts to extremely long space missions, such as voyages around the moon, to an asteroid and ultimately to Mars, NASA officials said.

NASA / Bill Ingalls
Expedition 26 commander Scott Kelly, wearing a turquoise wristband in honor of sister-in-law Gabrielle Giffords, looks out the window of a Russian search-and-rescue helicopter before the two-hour helicopter ride to Kustanay, Kazakhstan shortly after he and fellow crew members Oleg Skripochka and Alexander Kaleri landed in their Soyuz TMA-01M capsule near the town of Arkalyk, Kazakhstan on March 16, 2011.

"Congratulations to Scott and Mikhail on their selection for this important mission," William Gerstenmaier, NASA's associate administrator for Human Exploration and Operations in Washington, said in a statement. "Their skills and previous experience aboard the space station align with the mission's requirements. The one-year increment will expand the bounds of how we live and work in space and will increase our knowledge regarding the effects of microgravity on humans as we prepare for future missions beyond low-Earth orbit." [ Most Extreme Human Spaceflight Records

NASA is developing spacecraft and mission plans to send astronauts to visit a near-Earth asteroid by 2025, a goal set by President Barack Obama. The space agency is also reportedly studying potential manned missions back to the moon.

Kelly, 48, is a U.S. Navy captain who has flown on two space shuttle missions and one long-duration expedition on the International Space Station. He commanded the space station's Expedition 26 mission in 2010 during his third spaceflight.

Kelly hails from West Orange, N.J., and joined NASA's astronaut corps in 1996. His identical twin brother, Mark Kelly, also served as a Navy captain and NASA astronaut before retiring from the military and spaceflight in 2011.

Kornienko, 52, is also a veteran spaceflyer. The native of Syzran in Russia's Kuibyshev region is a former paratrooper officer who joined Russia's cosmonaut corps in 1998. Kornienko spent more than 176 days in space as a flight engineer on the station's Expedition 23 and 24 crews.

NASA and Russia announced plans for the one-year space station voyage earlier this year. Rumors of the flight were circling before the announcement, with the Russian news agency Interfax suggesting that veteran NASA astronaut Peggy Whitson — a veteran station commander — as a potential choice for the American crew member. Whitson stepped down from her position as NASA's chief astronaut earlier this year to rejoin the agency's active spaceflying ranks.

NASA
Cosmonaut Mikhail Kornienko, Expedition 23 flight engineer, watches fresh tomatoes floating freely in the Unity node of the International Space Station in May 2010.

Today's announcement, however, puts that theory to rest.

"Selection of the candidate for the one year mission was thorough and difficult due to the number of suitable candidates from the Cosmonaut  corps," Vladimir Popovkin, the head of Russian Federal Space Agency, said in a statement. "We have chosen the most responsible, skilled and enthusiastic crew members to expand space exploration, and we have full confidence in them."

The 2015 space station flight by Kelly and Kornienko will be the longest mission to the International Space Station, but not the longest continuous spaceflight.

That record is held by cosmonaut Valery Polyakov, who lived aboard Russia's Mir space station from January 1994 until March 1995, ultimately spending 438 consecutive days in orbit.

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The International Space Station is the product of cooperation by NASA, Russia and the space agencies of Europe, Japan and Canada. Construction of the $100 billion space station began in 1998 with the first crew taking up residence in 2000.

Astronauts and cosmonauts have lived on the space station in rotating crews ever since.

You can follow Space.com Managing Editor Tariq Malik on Twitter @tariqjmalik and Space.com on Twitter @Spacedotcom. We're also on Facebook  and  Google+.

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