Expedition 61 astronauts Christina Koch and Jessica Meir replace a battery charge/discharge unit.
This will be the first all-female EVA in the history of human spaceflight.
Spacewalk begins at 11:50 a.m. UTC and is slated to last 6 ½ hours.
The International Space Station (ISS) is a space station, or a habitable artificial satellite, in low Earth orbit. Its first component was launched into orbit in 1998, with the first long-term residents arriving in November 2000. It has been inhabited continuously since that date. The last pressurised module was fitted in 2011, and an experimental inflatable space habitat was added ...