On October 18, 2019, astronauts Christina Koch and Jessica Meir made history. Together they performed the first all-female spacewalk. The two astronauts spent seven hours outside of the International Space Station, replacing a broken power charging part called a battery charge-discharge unit, or BCDU. They also completed a few other tasks after the first one went smoothly.
Both women are part of the 2013 NASA astronaut group, which was the first group to consist equally of men and women. Koch's stay in space, scheduled for just under a year, will be the longest continuous time spent in space by a woman to date. Meir and Koch's historic spacewalk comes almost exactly 35 years after Kathryn Sullivan became the first American woman to walk in space in October 1984. Svetlana Savitskya was the first female spacewalker, just a few months before Sullivan.