November 6, 2015 6:54 AM EST

On Nov. 6, for the second time in just over a week, Scott Kelly and Kjell Lindgren will take a walk outside. That’s news, of course, because for Kelly and Lindgren, inside means the International Space Station and outside means, well, the frigid, airless, kill zone of space. So the walk requires a little work—and TIME will stream the entire event here, beginning at 5:45 AM ET.

The last time Kelly and Lindgren performed an EVA (extravehicular activity) was on Oct. 29, putting in seven hours and sixteen minutes of work to lay cable in preparation for the arrival of new docking modules and perform other basic maintenance tasks—or “basic,” if you’re grading on the curve of working in bulky suits, in zero-g, while flying around the planet at 17,150 mph (27,600 k/h). It was the first spacewalk for both men. (That time, Kelly was the lead spacewalker and wore red stripes on his suit to identify him. This time Lindgren will be the lead and will wear the official stripes.)

The work the astronauts will do on this second excursion will involve reactivating a radiator system on one of the station’s trusses after it was taken offline in 2012 because of a suspected ammonia leak. That leak was ultimately isolated in a different system, and the crew will thus power the idled component back up, top it off with new ammonia coolant, and retract and stow a back-up truss that had been filling in. That work is challenging enough, but it’s made all the more so by the very presence of the ammonia.

In the deep-freeze of space, ammonia freezes into flakes that look like floating bits of wax and that, like wax, can cling to anything they touch, including spacesuits. That’s not too much of a problem when the crew is outside, since they’re sealed inside their suits the whole time. But any ammonia they carry into the station could be toxic. For that reason, when the work is done, Lindgren and Kelly will go through what’s known as a bake-out period, which involves remaining outside in direct sunlight and allowing the solar energy to sublime the ammonia out of the suits.

It’s a simple procedure—basically orbital sunbathing. But it’s a break the astronauts will deserve before reentering the station, because walking in space itself—despite its slow-motion, free-floating grace—is about as far from simple as any job an astronaut will ever do in space. Watch it all live here.

TIME is producing a series of documentary films about Kelly’s record breaking mission. Watch here.

More Must-Reads From TIME

Write to Jeffrey Kluger at jeffrey.kluger@time.com.

You May Also Like
EDIT POST