Left:Astronaut Rick Mastracchio works in the payload bay of space shuttle Discovery during the first spacewalk of the STS-131 mission.
The mission plan for discovery included delivering supplies and equipment to the International Space Station. Inside the shuttle’s cargo bay is the Leonardo Multi-Purpose Logistics Module (MPLM), a pressurized “moving van” that was temporarily installed at the station. The module was used to deliver supplies, a new crew sleeping quarters and science racks that were transferred to the station’s laboratories. The 13-day mission also included three spacewalks to switch out a
gyroscope on the station’s truss, or backbone, install a spare ammonia storage tank (and return a used one) and retrieve a Japanese experiment from the station’s exterior.
-Article data and images courtesy of NASA.gov