Leading off a series of 10 planned spacewalks that will include the first by an all-female crew, a pair of NASA astronauts will venture outside the International Space Station on Sunday to upgrade the station’s power system.

Sunday’s spacewalk is scheduled to begin around 7:50 a.m. ET and is expected to last 6 1/2 hours. It will be conducted by Christina Koch and Andrew Morgan, who are among six space flyers now aboard the station.

NASA will live-stream the spacewalk on NASA TV beginning at 6:30 a.m. ET.

The series of planned spacewalks will continue over the next three months, marking a pace that hasn’t been seen since the construction of the 925,000-pound orbiting laboratory ended in 2011.

“It’s a really busy time,” Kirk Shireman, NASA’s program manager for the space station, said Friday in a news briefing. “It’ll be exciting and fun. We’re looking forward to it.”

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