Video: Narrated preview of Jan. 13 spacewalk

The Russian Soyuz MS-03 crew transport spacecraft is launched from the Baikonur Cosmodrome with three passengers on a two-day trek to the International Space Station.

Leaving crewmate Peggy Whitson behind in orbit for an extended mission, a Russian cosmonaut and his French co-pilot undocked from the International Space Station early Friday and plunged back to Earth, landing on the steppe of Kazakhstan to close out a 196-day mission.

Two astronauts ventured outside the International Space Station Friday for the first of four spacewalks to repair a $2 billion cosmic ray detector, breezing through work to prep the device for invasive surgery to splice in new coolant pumps and extend the instrument’s life probing the composition of the universe.