Video: Narrated preview of Jan. 6 spacewalk

Astronaut Shane Kimbrough and his two Russian crewmates — Soyuz MS-02 commander Sergey Ryzhikov and flight engineer Andrey Borisenko — undocked from the International Space Station and plunged back to Earth Monday, landing on the steppe of Kazakhstan to close out an extended 173-day mission.

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.

Two astronauts worked outside the International Space Station Wednesday to reposition two spare solar array ammonia coolant pump assemblies, putting a failed unit, dubbed “Leaky,” into long-term storage and attaching another, known as “Frosty,” to an appendage of the lab’s robot arm.