
In the Harmony node of the Earth-orbiting International Space Station, NASA astronaut Rick Mastracchio, Expedition 39 flight engineer, works with…

In the Harmony node of the Earth-orbiting International Space Station, NASA astronaut Rick Mastracchio, Expedition 39 flight engineer, works with…

NASA astronaut Steve Swanson, Expedition 39 flight engineer, works with NanoRacks hardware in the Kibo laboratory of the Japan Aerospace…

NASA astronaut Steve Swanson, Expedition 39 flight engineer, works with NanoRacks hardware in the Kibo laboratory of the Japan Aerospace…

In the Harmony node of the Earth-orbiting International Space Station, NASA astronaut Rick Mastracchio, Expedition 39 flight engineer, prepares culture…

NASA astronaut Steve Swanson, Expedition 39 flight engineer, works in the U.S. laboratory Destiny of the International Space Station, preparing…

One of the Expedition 39 crew members aboard the International Space Station photographed a half moon above Earth’s horizon on…

A Russian Soyuz spacecraft is seen docked to the International Space Station, as photographed by one of the Expedition 39…

On July 1, 2004, NASA’s Cassini spacecraft arrived at Saturn, marking the end of the spacecraft’s nearly seven-year journey through…