Expedition 61 Flight Engineers Christina Koch (left) poses for a photo with colleague Jessica Meir (right) while preparing for the first all-women spacewalk in history.
(Photo : NASA)

Friday, Oct. 18—NASA makes history once again as astronauts Jessica Meir and Christina Koch become the first to participate in an all-women spacewalk.

The walk, streamed live by NASA on Youtube and on NASA television, lasted for seven hours and seventeen minutes. This included a five-minute call from US President Donald Trump, where he congratulated the two women for this historic achievement.

The pair was successful in replacing a power controller that failed after the installation of new lithium-ion batteries last Oct. 11 in the International Space Station's truss structure. They also made preparations for future spacewalks.

Commander Luca Parmitano of the European Space Agency and NASA Flight Engineer Andrew Morgan assisted the spacewalkers. Morgan provided airlock and spacesuit support while Parmitano controlled the Candarm-2, ISS's robotic arm.

Russian cosmonaut Svetlana Savitskaya was the first woman to conduct a spacewalk, about 35 years ago. Now, Koch and Meir make history for being part of the first all-women spacewalk. This occurs more than 50 years after humanity's first steps on the moon. NASA astronaut Tracy Dyson hopes that this would be just a first and that this instance could become a common occurrence in the future.

"In the past, women haven't always been at the table," says Koch in an interview. "It's wonderful to be contributing to the space program at a time when all contributions are being accepted when everyone has a role." Koch also comments on how historical moments like this inspires and motivate people, which is an important aspect of this story.

Koch and Meir were part of NASA's class of 2013, where there was a total of eight astronaut trainees. This class was notable for having an equal number of males and females in the class—a first for NASA. Six years later, NASA has 12 female astronauts and 26 male astronauts within its ranks.

This historic moment happened later than it's supposed to be. Back in March, Koch was scheduled to participate in a spacewalk with colleague Anne McClain, but NASA had to postpone the mission after realizing that they didn't have appropriately sized spacesuits for the two. This story created a lot of buzzes—even inspiring a Saturday Night Live skit. This delay, many believed, highlighted the challenges women face in space exploration, and, to an extent, in the scientific community.

Anne McClain is a classmate of Koch and Meir for NASA's class of 2013 and is the first openly LGBT astronaut in space. Out of the class's four female astronauts, their classmate Nicole Mann remains to be the only one who's yet to participate in a spacewalk. Mann is currently assigned to Boe-CFT, the first test flight of the Boeing CSG-100 Starliner, which is part of NASA's Commercial Crew Program. 

A 30-minute in-space news conference will be held on Monday, Oct. 21, to review the first all-women spacewalk. Both Koch and Meir will participate in this conference while on-orbit. Viewers may watch the conference, which will be aired live on NASA Television and on their website.