Astronaut Chris Cassidy conducts a session with a pair of bowling-ball-sized free-flying satellites known as SPHERES.
Astronaut Karen Nyberg conducts a session with a pair of bowling-ball-sized free-flying satellites known as SPHERES.
Astronauts Chris Cassidy and Luca Parmitano work with the cargo in the newly attached Japanese "Kounotori" H2 Transfer Vehicle-4.
Astronaut Luca Parmitano prepares to open the hatch to the newly attached Japanese "Kounotori" H2 Transfer Vehicle-4.
Astronaut Luca Parmitano samples the air in the newly attached Japanese "Kounotori" H2 Transfer Vehicle-4.
A sunset over the Aleutian Islands, with noctilucent clouds, is featured in this image photographed by an Expedition 36 crew…
Astronaut Karen Nyberg conducts a session with a pair of bowling-ball-sized free-flying satellites known as SPHERES.
A close-up view of a bowling-ball-sized free-flying satellite known as Synchronized Position Hold, Engage, Reorient, Experimental Satellites, or SPHERES.
NASA astronaut Rick Mastracchio, wearing his Extravehicular Mobility Unit (EMU) spacesuit.
Expedition 38 crew members take a break from training at NASA's Johnson Space Center to pose for a crew portrait.
