Video: Narrated preview of Jan. 13 spacewalk

Two Russian cosmonauts used the International Space Station’s Poisk docking compartment as an airlock for the first time Wednesday in a six-hour 48-minute spacewalk to begin preparing the nearly identical Pirs module for removal next year. A new laboratory module will be parked in its place later.

Running nearly a month late because of work to repair a damaged cable, a Russian Soyuz spacecraft was primed for launch early Wednesday to carry two cosmonauts and a NASA astronaut to the International Space Station, boosting the lab’s crew back to six.

Japan’s space agency has set Sept. 30 as the target launch date for the country’s sixth resupply mission to the International Space Station, carrying cargo, experiments and six lithium-ion batteries to kick off a major upgrade of the lab’s electrical system.