Expedition 56 crew members pose for pictures in front of the Tsar Cannon at the Kremlin.
Each and every day NASA's Solar Dynamics Observatory (SDO) observes our Sun and relays observational data to scientists on Earth.
Two kinds of dramatic shadows play across the face of Saturn in this view from NASA’s Cassini spacecraft from Dec.…
Galileo Galilei discovered Jupiter's moon Europa in 1610. More than four centuries later, astronomers are still making discoveries about its…
Serena Auñón-Chancellor waits to board a Soyuz simulator.
Expedition 56 crew members in front of a Soyuz simulator.
The six-member Expedition 55 crew poses inside the Harmony module.
Al Bowers, center, and a group of student interns hook up a bungee cord for a flight of the Prandtl-D…
Expedition 56 prime crew member Serena Auñón-Chancellor of NASA
Expedition 56 backup crew members report for their final Soyuz spacecraft qualification exams
