Twins In Space: NASA's Twin Astronauts Mark and Scott Kelly (Photos)

Mark E. Kelly

NASA

Astronaut Mark E. Kelly, commander of STS-124, poses for a preflight photo.

Farewell, Space Station

NASA TV

Expedition 26 crew members (from left) Oleg Skripochka, Scott Kelly and Alexander Kaleri bid farewell from inside the Soyuz TMA-01M spacecraft before closing the hatches on March 15, 2011. The crew landed on Earth on March 16.landed

gabrielle-giffords-111001-02

Congresswoman Gabrielle Giffords office

Congresswoman Gabrielle Giffords (right) with her husband, NASA astronaut Mark Kelly.

Stephen Colbert Visits NASA

NASA

Comedy Central’s Stephen Colbert poses with astronaut Mark Kelly at NASA's Johnson Space Center in 2010.

A View to Behold

NASA via Ron Garan/Astro_Ron

This stunning photo shows two astronauts, Endeavour shuttle commander Mark Kelly and space station flight engineer Ron Garan (both of NASA) gazing out at Earth through the space station's Cupola. A bright blue Earth provides a breathtaking backdrop. The photo was taken on May 25, 2011 by NASA astronaut Mike Fincke during the third spacewalk of Endeavour's STS-134 mission.

Astronauts' Holiday Greetings Stress Unity on Earth

NASA

NASA astronaut Scott Kelly, commander of Expedition 26 aboard the International Space Station, poses for a holiday photo near the station's miniature Christmas tree.

Vice President Biden Honors Mark Kelly

White House Photo by David Lienemann

Vice President Joe Biden shakes hands with Captain Mark Kelly during his retirement ceremony in the Secretary of War Suite of the Eisenhower Executive Office Building, in Washington, D.C., Oct. 6, 2011. Kelly was presented the Legion of Merit and the Distinguished Flying Cross medals by the Vice President and Kelly's wife, U.S. Rep. Gabrielle Giffords, for his 25 years of service with the Navy and NASA.

Kelly Hugs Giffords During Retirement Ceremony

White House Photo by David Lienemann

Captain Mark Kelly hugs his wife Congresswoman Gabrielle Giffords after receiving the Legion of Merit from Vice President Joe Biden during Captain Kelly's retirement ceremony in the Secretary of War Suite in the Eisenhower Executive Office Building, in Washington, D.C., Oct. 6, 2011.

Captain Mark Kelly Speaks at his Retirement Ceremony

White House Photo by David Lienemann

Captain Mark Kelly speaks at his retirement ceremony with Vice President Joe Biden in the Secretary of War Suite in the Eisenhower Executive Office Building, in Washington, D.C., Oct. 6, 2011.

Mark Kelly in U2 Concert Appearance

NASA

Astronaut Mark Kelly spells out a message ("It's a beautiful day") while floating on the International Space Station during a video appearance at a U2 concert in Seattle June 5.

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