Two astronauts will venture outside the International Space Station today (March 22) to replace old batteries on the station’s solar arrays. This will be the first of three spacewalks scheduled to take place over the next three weeks, and you can watch them all live online!
One week from now, McClain will head out for her second spacewalk together with NASA astronaut Christina Koch. That will be the first all-female spacewalk in history. During these first two spacewalks, astronauts will continue ongoing work to upgrade the space station’s power system by replacing old nickel-hydrogen batteries with new and improved lithium-ion batteries. These upgrades began in 2017, when NASA astronauts Shane Kimbrough and Peggy Whitson and European Space Agency astronaut Thomas Pesquet swapped out the first set of batteries in a pair of back-to-back spacewalks.