STS-126 astronaut Steve Bowen and Heidemarie Stefanyshyn-Piper work to clean and lubricate part of the station's starboard Solar Alpha Rotary Joints (SARJ) and to remove two of SARJ's 12 trundle bearing assemblies [3072 x 2098]

https://go.nasa.gov/2BLEqY0 via /r/spaceporn http://bit.ly/2kol8ns