Video: Highlights of second Expedition 50 spacewalk

Working outside the International Space Station, NASA astronaut Reid Wiseman and European Space Agency crewmate Alexander Gerst successfully moved a failed ammonia pump module to an external stowage platform, completing a task originally planned for a repair spacewalk last December.

Japan’s sixth automated logistics vehicle packed with 4.5 tons of supplies approached the International Space Station for a laser-guided rendezvous, culminating with grapple of the HTV cargo craft by the station’s robotic arm at 1037 GMT (5:37 a.m. EST) Tuesday.

Picking up where they left off last week, two space station astronauts ventured back outside the outpost Wednesday to continue the replacement of aging batteries in the lab’s solar power system. Two more spacewalks later this month should complete the multi-year project.