See the original image at nasa.gov — Great Pic, Astronaut Repairing Satellite, w/Earth Background

Click to Enlarge

Description via NASA's STS-126 Shuttle Mission Imagery at http://spaceflight.nasa.gov/gallery/images/shuttle ... (spaceflight.nasa.gov/gallery/images/shuttle/sts-126/html/iss018e009292.html):

ISS018-E-009292 (20 Nov. 2008) --- Astronaut Shane Kimbrough, STS-126 mission specialist, participates in the mission's second scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 45-minute spacewalk, Kimbrough and astronaut Heidemarie Stefanyshyn-Piper (out of frame), mission specialist, continued the process of removing debris and applying lubrication around the starboard Solar Alpha Rotary Joint (SARJ), replaced four more of the SARJ's 12 trundle bearing assemblies, relocated two equipment carts and applied lubrication to the station's robotic Canadarm2