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…
